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Merge pull request #3386 from gabor-mezei-arm/3268_update_macros_for_ouput_buffer_size

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Add new support macros for output buffer sizes since PSA API 1.0 beta 3
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Ronald Cron 2021-03-11 13:30:42 +01:00 committed by GitHub
parent 5d5fa8b788 5699101ac9
commit fc86f3f147
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3 changed files with 636 additions and 100 deletions
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505
include/psa/crypto_sizes.h
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@ -65,8 +65,6 @@
* *
* \return The hash size for the specified hash algorithm. * \return The hash size for the specified hash algorithm.
* If the hash algorithm is not recognized, return 0. * If the hash algorithm is not recognized, return 0.
* An implementation may return either 0 or the correct size
* for a hash algorithm that it recognizes, but does not support.
*/ */
#define PSA_HASH_LENGTH(alg) \ #define PSA_HASH_LENGTH(alg) \
( \ ( \
@ -91,9 +89,8 @@
* *
* Maximum size of a hash. * Maximum size of a hash.
* *
* This macro must expand to a compile-time constant integer. This value * This macro expands to a compile-time constant integer. This value
* should be the maximum size of a hash supported by the implementation, * is the maximum size of a hash in bytes.
* in bytes, and must be no smaller than this maximum.
*/ */
/* Note: for HMAC-SHA-3, the block size is 144 bytes for HMAC-SHA3-226, /* Note: for HMAC-SHA-3, the block size is 144 bytes for HMAC-SHA3-226,
* 136 bytes for HMAC-SHA3-256, 104 bytes for SHA3-384, 72 bytes for * 136 bytes for HMAC-SHA3-256, 104 bytes for SHA3-384, 72 bytes for
@ -110,9 +107,8 @@
* *
* Maximum size of a MAC. * Maximum size of a MAC.
* *
* This macro must expand to a compile-time constant integer. This value * This macro expands to a compile-time constant integer. This value
* should be the maximum size of a MAC supported by the implementation, * is the maximum size of a MAC in bytes.
* in bytes, and must be no smaller than this maximum.
*/ */
/* All non-HMAC MACs have a maximum size that's smaller than the /* All non-HMAC MACs have a maximum size that's smaller than the
* minimum possible value of PSA_HASH_MAX_SIZE in this implementation. */ * minimum possible value of PSA_HASH_MAX_SIZE in this implementation. */
@ -132,15 +128,18 @@
* tag that can be distinguished from the rest of * tag that can be distinguished from the rest of
* the ciphertext, return 0. * the ciphertext, return 0.
* If the AEAD algorithm is not recognized, return 0. * If the AEAD algorithm is not recognized, return 0.
* An implementation may return either 0 or a
* correct size for an AEAD algorithm that it
* recognizes, but does not support.
*/ */
#define PSA_AEAD_TAG_LENGTH(alg) \ #define PSA_AEAD_TAG_LENGTH(alg) \
(PSA_ALG_IS_AEAD(alg) ? \ (PSA_ALG_IS_AEAD(alg) ? \
(((alg) & PSA_ALG_AEAD_TAG_LENGTH_MASK) >> PSA_AEAD_TAG_LENGTH_OFFSET) : \ (((alg) & PSA_ALG_AEAD_TAG_LENGTH_MASK) >> PSA_AEAD_TAG_LENGTH_OFFSET) : \
0) 0)
/** The maximum tag size for all supported AEAD algorithms, in bytes.
*
* See also #PSA_AEAD_TAG_LENGTH(\p alg).
*/
#define PSA_AEAD_TAG_MAX_SIZE 16
/* The maximum size of an RSA key on this implementation, in bits. /* The maximum size of an RSA key on this implementation, in bits.
* This is a vendor-specific macro. * This is a vendor-specific macro.
* *
@ -205,7 +204,7 @@
*/ */
#define PSA_TLS12_PSK_TO_MS_PSK_MAX_SIZE 128 #define PSA_TLS12_PSK_TO_MS_PSK_MAX_SIZE 128
/** The maximum size of a block cipher supported by the implementation. */ /** The maximum size of a block cipher. */
#define PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE 16 #define PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE 16
/** The size of the output of psa_mac_sign_finish(), in bytes. /** The size of the output of psa_mac_sign_finish(), in bytes.
@ -242,6 +241,10 @@
* insufficient buffer size. Depending on the algorithm, the actual size of * insufficient buffer size. Depending on the algorithm, the actual size of
* the ciphertext may be smaller. * the ciphertext may be smaller.
* *
* \warning This macro may evaluate its arguments multiple times or
* zero times, so you should not pass arguments that contain
* side effects.
*
* \param alg An AEAD algorithm * \param alg An AEAD algorithm
* (\c PSA_ALG_XXX value such that * (\c PSA_ALG_XXX value such that
* #PSA_ALG_IS_AEAD(\p alg) is true). * #PSA_ALG_IS_AEAD(\p alg) is true).
@ -250,15 +253,33 @@
* \return The AEAD ciphertext size for the specified * \return The AEAD ciphertext size for the specified
* algorithm. * algorithm.
* If the AEAD algorithm is not recognized, return 0. * If the AEAD algorithm is not recognized, return 0.
* An implementation may return either 0 or a
* correct size for an AEAD algorithm that it
* recognizes, but does not support.
*/ */
#define PSA_AEAD_ENCRYPT_OUTPUT_SIZE(alg, plaintext_length) \ #define PSA_AEAD_ENCRYPT_OUTPUT_SIZE(alg, plaintext_length) \
(PSA_AEAD_TAG_LENGTH(alg) != 0 ? \ (PSA_AEAD_TAG_LENGTH(alg) != 0 ? \
(plaintext_length) + PSA_AEAD_TAG_LENGTH(alg) : \ (plaintext_length) + PSA_AEAD_TAG_LENGTH(alg) : \
0) 0)
/** A sufficient output buffer size for psa_aead_encrypt(), for any of the
* supported key types and AEAD algorithms.
*
* If the size of the ciphertext buffer is at least this large, it is guaranteed
* that psa_aead_encrypt() will not fail due to an insufficient buffer size.
*
* \note This macro returns a compile-time constant if its arguments are
* compile-time constants.
*
* See also #PSA_AEAD_ENCRYPT_OUTPUT_SIZE(\p alg, \p plaintext_length).
*
* \param plaintext_length Size of the plaintext in bytes.
*
* \return A sufficient output buffer size for any of the
* supported key types and AEAD algorithms.
*
*/
#define PSA_AEAD_ENCRYPT_OUTPUT_MAX_SIZE(plaintext_length) \
((plaintext_length) + PSA_AEAD_TAG_MAX_SIZE)
/** The maximum size of the output of psa_aead_decrypt(), in bytes. /** The maximum size of the output of psa_aead_decrypt(), in bytes.
* *
* If the size of the plaintext buffer is at least this large, it is * If the size of the plaintext buffer is at least this large, it is
@ -266,6 +287,10 @@
* insufficient buffer size. Depending on the algorithm, the actual size of * insufficient buffer size. Depending on the algorithm, the actual size of
* the plaintext may be smaller. * the plaintext may be smaller.
* *
* \warning This macro may evaluate its arguments multiple times or
* zero times, so you should not pass arguments that contain
* side effects.
*
* \param alg An AEAD algorithm * \param alg An AEAD algorithm
* (\c PSA_ALG_XXX value such that * (\c PSA_ALG_XXX value such that
* #PSA_ALG_IS_AEAD(\p alg) is true). * #PSA_ALG_IS_AEAD(\p alg) is true).
@ -274,15 +299,78 @@
* \return The AEAD ciphertext size for the specified * \return The AEAD ciphertext size for the specified
* algorithm. * algorithm.
* If the AEAD algorithm is not recognized, return 0. * If the AEAD algorithm is not recognized, return 0.
* An implementation may return either 0 or a
* correct size for an AEAD algorithm that it
* recognizes, but does not support.
*/ */
#define PSA_AEAD_DECRYPT_OUTPUT_SIZE(alg, ciphertext_length) \ #define PSA_AEAD_DECRYPT_OUTPUT_SIZE(alg, ciphertext_length) \
(PSA_AEAD_TAG_LENGTH(alg) != 0 ? \ (PSA_AEAD_TAG_LENGTH(alg) != 0 ? \
(ciphertext_length) - PSA_AEAD_TAG_LENGTH(alg) : \ (ciphertext_length) - PSA_AEAD_TAG_LENGTH(alg) : \
0) 0)
/** A sufficient output buffer size for psa_aead_decrypt(), for any of the
* supported key types and AEAD algorithms.
*
* If the size of the plaintext buffer is at least this large, it is guaranteed
* that psa_aead_decrypt() will not fail due to an insufficient buffer size.
*
* \note This macro returns a compile-time constant if its arguments are
* compile-time constants.
*
* See also #PSA_AEAD_DECRYPT_OUTPUT_SIZE(\p alg, \p ciphertext_length).
*
* \param ciphertext_length Size of the ciphertext in bytes.
*
* \return A sufficient output buffer size for any of the
* supported key types and AEAD algorithms.
*
*/
#define PSA_AEAD_DECRYPT_OUTPUT_MAX_SIZE(ciphertext_length) \
(ciphertext_length)
/** The default nonce size for an AEAD algorithm, in bytes.
*
* This macro can be used to allocate a buffer of sufficient size to
* store the nonce output from #psa_aead_generate_nonce().
*
* See also #PSA_AEAD_NONCE_MAX_SIZE.
*
* \note This is not the maximum size of nonce supported as input to
* #psa_aead_set_nonce(), #psa_aead_encrypt() or #psa_aead_decrypt(),
* just the default size that is generated by #psa_aead_generate_nonce().
*
* \warning This macro may evaluate its arguments multiple times or
* zero times, so you should not pass arguments that contain
* side effects.
*
* \param key_type A symmetric key type that is compatible with
* algorithm \p alg.
*
* \param alg An AEAD algorithm (\c PSA_ALG_XXX value such that
* #PSA_ALG_IS_AEAD(\p alg) is true).
*
* \return The default nonce size for the specified key type and algorithm.
* If the key type or AEAD algorithm is not recognized,
* or the parameters are incompatible, return 0.
*/
#define PSA_AEAD_NONCE_LENGTH(key_type, alg) \
(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) == 16 && \
(PSA_ALG_AEAD_WITH_DEFAULT_LENGTH_TAG(alg) == PSA_ALG_CCM || \
PSA_ALG_AEAD_WITH_DEFAULT_LENGTH_TAG(alg) == PSA_ALG_GCM) ? 12 : \
(key_type) == PSA_KEY_TYPE_CHACHA20 && \
PSA_ALG_AEAD_WITH_DEFAULT_LENGTH_TAG(alg) == PSA_ALG_CHACHA20_POLY1305 ? 12 : \
0)
/** The maximum default nonce size among all supported pairs of key types and
* AEAD algorithms, in bytes.
*
* This is equal to or greater than any value that #PSA_AEAD_NONCE_LENGTH()
* may return.
*
* \note This is not the maximum size of nonce supported as input to
* #psa_aead_set_nonce(), #psa_aead_encrypt() or #psa_aead_decrypt(),
* just the largest size that may be generated by
* #psa_aead_generate_nonce().
*/
#define PSA_AEAD_NONCE_MAX_SIZE 12
/** A sufficient output buffer size for psa_aead_update(). /** A sufficient output buffer size for psa_aead_update().
* *
* If the size of the output buffer is at least this large, it is * If the size of the output buffer is at least this large, it is
@ -290,6 +378,10 @@
* insufficient buffer size. The actual size of the output may be smaller * insufficient buffer size. The actual size of the output may be smaller
* in any given call. * in any given call.
* *
* \warning This macro may evaluate its arguments multiple times or
* zero times, so you should not pass arguments that contain
* side effects.
*
* \param alg An AEAD algorithm * \param alg An AEAD algorithm
* (\c PSA_ALG_XXX value such that * (\c PSA_ALG_XXX value such that
* #PSA_ALG_IS_AEAD(\p alg) is true). * #PSA_ALG_IS_AEAD(\p alg) is true).
@ -298,9 +390,6 @@
* \return A sufficient output buffer size for the specified * \return A sufficient output buffer size for the specified
* algorithm. * algorithm.
* If the AEAD algorithm is not recognized, return 0. * If the AEAD algorithm is not recognized, return 0.
* An implementation may return either 0 or a
* correct size for an AEAD algorithm that it
* recognizes, but does not support.
*/ */
/* For all the AEAD modes defined in this specification, it is possible /* For all the AEAD modes defined in this specification, it is possible
* to emit output without delay. However, hardware may not always be * to emit output without delay. However, hardware may not always be
@ -309,7 +398,20 @@
#define PSA_AEAD_UPDATE_OUTPUT_SIZE(alg, input_length) \ #define PSA_AEAD_UPDATE_OUTPUT_SIZE(alg, input_length) \
(PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \ (PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \
PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE, (input_length)) : \ PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE, (input_length)) : \
(input_length)) (input_length)) : \
/** A sufficient output buffer size for psa_aead_update(), for any of the
* supported key types and AEAD algorithms.
*
* If the size of the output buffer is at least this large, it is guaranteed
* that psa_aead_update() will not fail due to an insufficient buffer size.
*
* See also #PSA_AEAD_UPDATE_OUTPUT_SIZE(\p alg, \p input_length).
*
* \param input_length Size of the input in bytes.
*/
#define PSA_AEAD_UPDATE_OUTPUT_MAX_SIZE(input_length) \
(PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE, (input_length)))
/** A sufficient ciphertext buffer size for psa_aead_finish(). /** A sufficient ciphertext buffer size for psa_aead_finish().
* *
@ -325,15 +427,19 @@
* \return A sufficient ciphertext buffer size for the * \return A sufficient ciphertext buffer size for the
* specified algorithm. * specified algorithm.
* If the AEAD algorithm is not recognized, return 0. * If the AEAD algorithm is not recognized, return 0.
* An implementation may return either 0 or a
* correct size for an AEAD algorithm that it
* recognizes, but does not support.
*/ */
#define PSA_AEAD_FINISH_OUTPUT_SIZE(alg) \ #define PSA_AEAD_FINISH_OUTPUT_SIZE(alg) \
(PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \ (PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \
PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE : \ PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE : \
0) 0)
/** A sufficient ciphertext buffer size for psa_aead_finish(), for any of the
* supported key types and AEAD algorithms.
*
* See also #PSA_AEAD_FINISH_OUTPUT_SIZE(\p alg).
*/
#define PSA_AEAD_FINISH_OUTPUT_MAX_SIZE (PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE)
/** A sufficient plaintext buffer size for psa_aead_verify(). /** A sufficient plaintext buffer size for psa_aead_verify().
* *
* If the size of the plaintext buffer is at least this large, it is * If the size of the plaintext buffer is at least this large, it is
@ -348,15 +454,19 @@
* \return A sufficient plaintext buffer size for the * \return A sufficient plaintext buffer size for the
* specified algorithm. * specified algorithm.
* If the AEAD algorithm is not recognized, return 0. * If the AEAD algorithm is not recognized, return 0.
* An implementation may return either 0 or a
* correct size for an AEAD algorithm that it
* recognizes, but does not support.
*/ */
#define PSA_AEAD_VERIFY_OUTPUT_SIZE(alg) \ #define PSA_AEAD_VERIFY_OUTPUT_SIZE(alg) \
(PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \ (PSA_ALG_IS_AEAD_ON_BLOCK_CIPHER(alg) ? \
PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE : \ PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE : \
0) 0)
/** A sufficient plaintext buffer size for psa_aead_verify(), for any of the
* supported key types and AEAD algorithms.
*
* See also #PSA_AEAD_VERIFY_OUTPUT_SIZE(\p alg).
*/
#define PSA_AEAD_VERIFY_OUTPUT_MAX_SIZE (PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE)
#define PSA_RSA_MINIMUM_PADDING_SIZE(alg) \ #define PSA_RSA_MINIMUM_PADDING_SIZE(alg) \
(PSA_ALG_IS_RSA_OAEP(alg) ? \ (PSA_ALG_IS_RSA_OAEP(alg) ? \
2 * PSA_HASH_LENGTH(PSA_ALG_RSA_OAEP_GET_HASH(alg)) + 1 : \ 2 * PSA_HASH_LENGTH(PSA_ALG_RSA_OAEP_GET_HASH(alg)) + 1 : \
@ -393,9 +503,8 @@
* a buffer size in bytes that guarantees that * a buffer size in bytes that guarantees that
* psa_sign_hash() will not fail with * psa_sign_hash() will not fail with
* #PSA_ERROR_BUFFER_TOO_SMALL. * #PSA_ERROR_BUFFER_TOO_SMALL.
* If the parameters are a valid combination that is not supported * If the parameters are a valid combination that is not supported,
* by the implementation, this macro shall return either a * return either a sensible size or 0.
* sensible size or 0.
* If the parameters are not valid, the * If the parameters are not valid, the
* return value is unspecified. * return value is unspecified.
*/ */
@ -411,9 +520,8 @@
* *
* Maximum size of an asymmetric signature. * Maximum size of an asymmetric signature.
* *
* This macro must expand to a compile-time constant integer. This value * This macro expands to a compile-time constant integer. This value
* should be the maximum size of a signature supported by the implementation, * is the maximum size of a signature in bytes.
* in bytes, and must be no smaller than this maximum.
*/ */
#define PSA_SIGNATURE_MAX_SIZE \ #define PSA_SIGNATURE_MAX_SIZE \
(PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS) > PSA_VENDOR_ECDSA_SIGNATURE_MAX_SIZE ? \ (PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS) > PSA_VENDOR_ECDSA_SIGNATURE_MAX_SIZE ? \
@ -440,9 +548,8 @@
* a buffer size in bytes that guarantees that * a buffer size in bytes that guarantees that
* psa_asymmetric_encrypt() will not fail with * psa_asymmetric_encrypt() will not fail with
* #PSA_ERROR_BUFFER_TOO_SMALL. * #PSA_ERROR_BUFFER_TOO_SMALL.
* If the parameters are a valid combination that is not supported * If the parameters are a valid combination that is not supported,
* by the implementation, this macro shall return either a * return either a sensible size or 0.
* sensible size or 0.
* If the parameters are not valid, the * If the parameters are not valid, the
* return value is unspecified. * return value is unspecified.
*/ */
@ -451,6 +558,15 @@
((void)alg, PSA_BITS_TO_BYTES(key_bits)) : \ ((void)alg, PSA_BITS_TO_BYTES(key_bits)) : \
0) 0)
/** A sufficient output buffer size for psa_asymmetric_encrypt(), for any
* supported asymmetric encryption.
*
* See also #PSA_ASYMMETRIC_ENCRYPT_OUTPUT_SIZE(\p key_type, \p key_bits, \p alg).
*/
/* This macro assumes that RSA is the only supported asymmetric encryption. */
#define PSA_ASYMMETRIC_ENCRYPT_OUTPUT_MAX_SIZE \
(PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS))
/** Sufficient output buffer size for psa_asymmetric_decrypt(). /** Sufficient output buffer size for psa_asymmetric_decrypt().
* *
* This macro returns a sufficient buffer size for a plaintext produced using * This macro returns a sufficient buffer size for a plaintext produced using
@ -471,9 +587,8 @@
* a buffer size in bytes that guarantees that * a buffer size in bytes that guarantees that
* psa_asymmetric_decrypt() will not fail with * psa_asymmetric_decrypt() will not fail with
* #PSA_ERROR_BUFFER_TOO_SMALL. * #PSA_ERROR_BUFFER_TOO_SMALL.
* If the parameters are a valid combination that is not supported * If the parameters are a valid combination that is not supported,
* by the implementation, this macro shall return either a * return either a sensible size or 0.
* sensible size or 0.
* If the parameters are not valid, the * If the parameters are not valid, the
* return value is unspecified. * return value is unspecified.
*/ */
@ -482,6 +597,16 @@
PSA_BITS_TO_BYTES(key_bits) - PSA_RSA_MINIMUM_PADDING_SIZE(alg) : \ PSA_BITS_TO_BYTES(key_bits) - PSA_RSA_MINIMUM_PADDING_SIZE(alg) : \
0) 0)
/** A sufficient output buffer size for psa_asymmetric_decrypt(), for any
* supported asymmetric decryption.
*
* This macro assumes that RSA is the only supported asymmetric encryption.
*
* See also #PSA_ASYMMETRIC_DECRYPT_OUTPUT_SIZE(\p key_type, \p key_bits, \p alg).
*/
#define PSA_ASYMMETRIC_DECRYPT_OUTPUT_MAX_SIZE \
(PSA_BITS_TO_BYTES(PSA_VENDOR_RSA_MAX_KEY_BITS))
/* Maximum size of the ASN.1 encoding of an INTEGER with the specified /* Maximum size of the ASN.1 encoding of an INTEGER with the specified
* number of bits. * number of bits.
* *
@ -627,11 +752,9 @@
* a buffer size in bytes that guarantees that * a buffer size in bytes that guarantees that
* psa_export_key() or psa_export_public_key() will not fail with * psa_export_key() or psa_export_public_key() will not fail with
* #PSA_ERROR_BUFFER_TOO_SMALL. * #PSA_ERROR_BUFFER_TOO_SMALL.
* If the parameters are a valid combination that is not supported * If the parameters are a valid combination that is not supported,
* by the implementation, this macro shall return either a * return either a sensible size or 0.
* sensible size or 0. * If the parameters are not valid, the return value is unspecified.
* If the parameters are not valid, the
* return value is unspecified.
*/ */
#define PSA_EXPORT_KEY_OUTPUT_SIZE(key_type, key_bits) \ #define PSA_EXPORT_KEY_OUTPUT_SIZE(key_type, key_bits) \
(PSA_KEY_TYPE_IS_UNSTRUCTURED(key_type) ? PSA_BITS_TO_BYTES(key_bits) : \ (PSA_KEY_TYPE_IS_UNSTRUCTURED(key_type) ? PSA_BITS_TO_BYTES(key_bits) : \
@ -643,48 +766,123 @@
PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY(key_type) ? PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) : \ PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY(key_type) ? PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) : \
0) 0)
/** The default nonce size for an AEAD algorithm, in bytes. /** Sufficient output buffer size for psa_export_public_key().
* *
* This macro can be used to allocate a buffer of sufficient size to * This macro returns a compile-time constant if its arguments are
* store the nonce output from #psa_aead_generate_nonce(). * compile-time constants.
*
* See also #PSA_AEAD_NONCE_MAX_SIZE.
*
* \note This is not the maximum size of nonce supported as input to #psa_aead_set_nonce(),
* #psa_aead_encrypt() or #psa_aead_decrypt(), just the default size that is generated by
* #psa_aead_generate_nonce().
* *
* \warning This macro may evaluate its arguments multiple times or * \warning This macro may evaluate its arguments multiple times or
* zero times, so you should not pass arguments that contain * zero times, so you should not pass arguments that contain
* side effects. * side effects.
* *
* \param key_type A symmetric key type that is compatible with algorithm \p alg. * The following code illustrates how to allocate enough memory to export
* a public key by querying the key type and size at runtime.
* \code{c}
* psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
* psa_status_t status;
* status = psa_get_key_attributes(key, &attributes);
* if (status != PSA_SUCCESS) handle_error(...);
* psa_key_type_t key_type = psa_get_key_type(&attributes);
* size_t key_bits = psa_get_key_bits(&attributes);
* size_t buffer_size = PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE(key_type, key_bits);
* psa_reset_key_attributes(&attributes);
* uint8_t *buffer = malloc(buffer_size);
* if (buffer == NULL) handle_error(...);
* size_t buffer_length;
* status = psa_export_public_key(key, buffer, buffer_size, &buffer_length);
* if (status != PSA_SUCCESS) handle_error(...);
* \endcode
* *
* \param alg An AEAD algorithm (\c PSA_ALG_XXX value such that #PSA_ALG_IS_AEAD(\p alg) is true). * \param key_type A public key or key pair key type.
* \param key_bits The size of the key in bits.
* *
* \return The default nonce size for the specified key type and algorithm. * \return If the parameters are valid and supported, return
* If the key type or AEAD algorithm is not recognized, * a buffer size in bytes that guarantees that
* or the parameters are incompatible, return 0. * psa_export_public_key() will not fail with
* An implementation can return either 0 or a correct size for a key type * #PSA_ERROR_BUFFER_TOO_SMALL.
* and AEAD algorithm that it recognizes, but does not support. * If the parameters are a valid combination that is not
* supported, return either a sensible size or 0.
* If the parameters are not valid,
* the return value is unspecified.
*
* If the parameters are valid and supported,
* return the same result as
* #PSA_EXPORT_KEY_OUTPUT_SIZE(
* \p #PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR(\p key_type),
* \p key_bits).
*/ */
#define PSA_AEAD_NONCE_LENGTH(key_type, alg) \ #define PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE(key_type, key_bits) \
(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) == 16 && \ (PSA_KEY_TYPE_IS_RSA(key_type) ? PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(key_bits) : \
(PSA_ALG_AEAD_WITH_DEFAULT_LENGTH_TAG(alg) == PSA_ALG_CCM || \ PSA_KEY_TYPE_IS_ECC(key_type) ? PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(key_bits) : \
PSA_ALG_AEAD_WITH_DEFAULT_LENGTH_TAG(alg) == PSA_ALG_GCM) ? 12 : \
(key_type) == PSA_KEY_TYPE_CHACHA20 && \
PSA_ALG_AEAD_WITH_DEFAULT_LENGTH_TAG(alg) == PSA_ALG_CHACHA20_POLY1305 ? 12 : \
0) 0)
/** The maximum default nonce size among all supported pairs of key types and AEAD algorithms, in bytes. /** Sufficient buffer size for exporting any asymmetric key pair.
* *
* This is equal to or greater than any value that #PSA_AEAD_NONCE_LENGTH() may return. * This macro expands to a compile-time constant integer. This value is
* a sufficient buffer size when calling psa_export_key() to export any
* asymmetric key pair, regardless of the exact key type and key size.
* *
* \note This is not the maximum size of nonce supported as input to #psa_aead_set_nonce(), * See also #PSA_EXPORT_KEY_OUTPUT_SIZE(\p key_type, \p key_bits).
* #psa_aead_encrypt() or #psa_aead_decrypt(), just the largest size that may be generated by
* #psa_aead_generate_nonce().
*/ */
#define PSA_AEAD_NONCE_MAX_SIZE 12 #define PSA_EXPORT_KEY_PAIR_MAX_SIZE \
(PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS) > \
PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS) ? \
PSA_KEY_EXPORT_RSA_KEY_PAIR_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS) : \
PSA_KEY_EXPORT_ECC_KEY_PAIR_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS))
/** Sufficient buffer size for exporting any asymmetric public key.
*
* This macro expands to a compile-time constant integer. This value is
* a sufficient buffer size when calling psa_export_key() or
* psa_export_public_key() to export any asymmetric public key,
* regardless of the exact key type and key size.
*
* See also #PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE(\p key_type, \p key_bits).
*/
#define PSA_EXPORT_PUBLIC_KEY_MAX_SIZE \
(PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS) > \
PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS) ? \
PSA_KEY_EXPORT_RSA_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_RSA_MAX_KEY_BITS) : \
PSA_KEY_EXPORT_ECC_PUBLIC_KEY_MAX_SIZE(PSA_VENDOR_ECC_MAX_CURVE_BITS))
/** Sufficient output buffer size for psa_raw_key_agreement().
*
* This macro returns a compile-time constant if its arguments are
* compile-time constants.
*
* \warning This macro may evaluate its arguments multiple times or
* zero times, so you should not pass arguments that contain
* side effects.
*
* See also #PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE.
*
* \param key_type A supported key type.
* \param key_bits The size of the key in bits.
*
* \return If the parameters are valid and supported, return
* a buffer size in bytes that guarantees that
* psa_raw_key_agreement() will not fail with
* #PSA_ERROR_BUFFER_TOO_SMALL.
* If the parameters are a valid combination that
* is not supported, return either a sensible size or 0.
* If the parameters are not valid,
* the return value is unspecified.
*/
/* FFDH is not yet supported in PSA. */
#define PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE(key_type, key_bits) \
(PSA_KEY_TYPE_IS_ECC_KEY_PAIR(key_type) ? \
PSA_BITS_TO_BYTES(key_bits) : \
0)
/** Maximum size of the output from psa_raw_key_agreement().
*
* This macro expands to a compile-time constant integer. This value is the
* maximum size of the output any raw key agreement algorithm, in bytes.
*
* See also #PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE(\p key_type, \p key_bits).
*/
#define PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE \
(PSA_BITS_TO_BYTES(PSA_VENDOR_ECC_MAX_CURVE_BITS))
/** The default IV size for a cipher algorithm, in bytes. /** The default IV size for a cipher algorithm, in bytes.
* *
@ -709,8 +907,6 @@
* If the algorithm does not use an IV, return 0. * If the algorithm does not use an IV, return 0.
* If the key type or cipher algorithm is not recognized, * If the key type or cipher algorithm is not recognized,
* or the parameters are incompatible, return 0. * or the parameters are incompatible, return 0.
* An implementation can return either 0 or a correct size for a key type
* and cipher algorithm that it recognizes, but does not support.
*/ */
#define PSA_CIPHER_IV_LENGTH(key_type, alg) \ #define PSA_CIPHER_IV_LENGTH(key_type, alg) \
(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) > 1 && \ (PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) > 1 && \
@ -730,4 +926,163 @@
*/ */
#define PSA_CIPHER_IV_MAX_SIZE 16 #define PSA_CIPHER_IV_MAX_SIZE 16
/** The maximum size of the output of psa_cipher_encrypt(), in bytes.
*
* If the size of the output buffer is at least this large, it is guaranteed
* that psa_cipher_encrypt() will not fail due to an insufficient buffer size.
* Depending on the algorithm, the actual size of the output might be smaller.
*
* See also #PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE(\p input_length).
*
* \warning This macro may evaluate its arguments multiple times or
* zero times, so you should not pass arguments that contain
* side effects.
*
* \param key_type A symmetric key type that is compatible with algorithm
* alg.
* \param alg A cipher algorithm (\c PSA_ALG_XXX value such that
* #PSA_ALG_IS_CIPHER(\p alg) is true).
* \param input_length Size of the input in bytes.
*
* \return A sufficient output size for the specified key type and
* algorithm. If the key type or cipher algorithm is not
* recognized, or the parameters are incompatible,
* return 0.
*/
#define PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(key_type, alg, input_length) \
(alg == PSA_ALG_CBC_PKCS7 ? \
PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type), \
(input_length) + 1) + \
PSA_CIPHER_IV_LENGTH((key_type), (alg)) : \
(PSA_ALG_IS_CIPHER(alg) ? \
(input_length) + PSA_CIPHER_IV_LENGTH((key_type), (alg)) : \
0))
/** A sufficient output buffer size for psa_cipher_encrypt(), for any of the
* supported key types and cipher algorithms.
*
* If the size of the output buffer is at least this large, it is guaranteed
* that psa_cipher_encrypt() will not fail due to an insufficient buffer size.
*
* See also #PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(\p key_type, \p alg, \p input_length).
*
* \param input_length Size of the input in bytes.
*
*/
#define PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE(input_length) \
(PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE, \
(input_length) + 1) + \
PSA_CIPHER_IV_MAX_SIZE)
/** The maximum size of the output of psa_cipher_decrypt(), in bytes.
*
* If the size of the output buffer is at least this large, it is guaranteed
* that psa_cipher_decrypt() will not fail due to an insufficient buffer size.
* Depending on the algorithm, the actual size of the output might be smaller.
*
* See also #PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE(\p input_length).
*
* \param key_type A symmetric key type that is compatible with algorithm
* alg.
* \param alg A cipher algorithm (\c PSA_ALG_XXX value such that
* #PSA_ALG_IS_CIPHER(\p alg) is true).
* \param input_length Size of the input in bytes.
*
* \return A sufficient output size for the specified key type and
* algorithm. If the key type or cipher algorithm is not
* recognized, or the parameters are incompatible,
* return 0.
*/
#define PSA_CIPHER_DECRYPT_OUTPUT_SIZE(key_type, alg, input_length) \
(PSA_ALG_IS_CIPHER(alg) && \
((key_type) & PSA_KEY_TYPE_CATEGORY_MASK) == PSA_KEY_TYPE_CATEGORY_SYMMETRIC ? \
(input_length) : \
0)
/** A sufficient output buffer size for psa_cipher_decrypt(), for any of the
* supported key types and cipher algorithms.
*
* If the size of the output buffer is at least this large, it is guaranteed
* that psa_cipher_decrypt() will not fail due to an insufficient buffer size.
*
* See also #PSA_CIPHER_DECRYPT_OUTPUT_SIZE(\p key_type, \p alg, \p input_length).
*
* \param input_length Size of the input in bytes.
*/
#define PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE(input_length) \
(input_length)
/** A sufficient output buffer size for psa_cipher_update().
*
* If the size of the output buffer is at least this large, it is guaranteed
* that psa_cipher_update() will not fail due to an insufficient buffer size.
* The actual size of the output might be smaller in any given call.
*
* See also #PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE(\p input_length).
*
* \param key_type A symmetric key type that is compatible with algorithm
* alg.
* \param alg A cipher algorithm (PSA_ALG_XXX value such that
* #PSA_ALG_IS_CIPHER(\p alg) is true).
* \param input_length Size of the input in bytes.
*
* \return A sufficient output size for the specified key type and
* algorithm. If the key type or cipher algorithm is not
* recognized, or the parameters are incompatible, return 0.
*/
#define PSA_CIPHER_UPDATE_OUTPUT_SIZE(key_type, alg, input_length) \
(PSA_ALG_IS_CIPHER(alg) ? \
(((alg) == PSA_ALG_CBC_PKCS7 || \
(alg) == PSA_ALG_CBC_NO_PADDING || \
(alg) == PSA_ALG_ECB_NO_PADDING) ? \
PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type), \
input_length) : \
(input_length)) : \
0)
/** A sufficient output buffer size for psa_cipher_update(), for any of the
* supported key types and cipher algorithms.
*
* If the size of the output buffer is at least this large, it is guaranteed
* that psa_cipher_update() will not fail due to an insufficient buffer size.
*
* See also #PSA_CIPHER_UPDATE_OUTPUT_SIZE(\p key_type, \p alg, \p input_length).
*
* \param input_length Size of the input in bytes.
*/
#define PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE(input_length) \
(PSA_ROUND_UP_TO_MULTIPLE(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE, input_length))
/** A sufficient ciphertext buffer size for psa_cipher_finish().
*
* If the size of the ciphertext buffer is at least this large, it is
* guaranteed that psa_cipher_finish() will not fail due to an insufficient
* ciphertext buffer size. The actual size of the output might be smaller in
* any given call.
*
* See also #PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE().
*
* \param key_type A symmetric key type that is compatible with algorithm
* alg.
* \param alg A cipher algorithm (PSA_ALG_XXX value such that
* #PSA_ALG_IS_CIPHER(\p alg) is true).
* \return A sufficient output size for the specified key type and
* algorithm. If the key type or cipher algorithm is not
* recognized, or the parameters are incompatible, return 0.
*/
#define PSA_CIPHER_FINISH_OUTPUT_SIZE(key_type, alg) \
(PSA_ALG_IS_CIPHER(alg) ? \
(alg == PSA_ALG_CBC_PKCS7 ? \
PSA_BLOCK_CIPHER_BLOCK_LENGTH(key_type) : \
0) : \
0)
/** A sufficient ciphertext buffer size for psa_cipher_finish(), for any of the
* supported key types and cipher algorithms.
*
* See also #PSA_CIPHER_FINISH_OUTPUT_SIZE(\p key_type, \p alg).
*/
#define PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE \
(PSA_BLOCK_CIPHER_BLOCK_MAX_SIZE)
#endif /* PSA_CRYPTO_SIZES_H */ #endif /* PSA_CRYPTO_SIZES_H */

31
tests/src/psa_exercise_key.c
View file

@ -486,7 +486,7 @@ psa_status_t mbedtls_test_psa_key_agreement_with_self(
private_key_type = psa_get_key_type( &attributes ); private_key_type = psa_get_key_type( &attributes );
key_bits = psa_get_key_bits( &attributes ); key_bits = psa_get_key_bits( &attributes );
public_key_type = PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR( private_key_type ); public_key_type = PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR( private_key_type );
public_key_length = PSA_EXPORT_KEY_OUTPUT_SIZE( public_key_type, key_bits ); public_key_length = PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE( public_key_type, key_bits );
ASSERT_ALLOC( public_key, public_key_length ); ASSERT_ALLOC( public_key, public_key_length );
PSA_ASSERT( psa_export_public_key( key, public_key, public_key_length, PSA_ASSERT( psa_export_public_key( key, public_key, public_key_length,
&public_key_length ) ); &public_key_length ) );
@ -528,7 +528,7 @@ psa_status_t mbedtls_test_psa_raw_key_agreement_with_self(
private_key_type = psa_get_key_type( &attributes ); private_key_type = psa_get_key_type( &attributes );
key_bits = psa_get_key_bits( &attributes ); key_bits = psa_get_key_bits( &attributes );
public_key_type = PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR( private_key_type ); public_key_type = PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR( private_key_type );
public_key_length = PSA_EXPORT_KEY_OUTPUT_SIZE( public_key_type, key_bits ); public_key_length = PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE( public_key_type, key_bits );
ASSERT_ALLOC( public_key, public_key_length ); ASSERT_ALLOC( public_key, public_key_length );
PSA_ASSERT( psa_export_public_key( key, PSA_ASSERT( psa_export_public_key( key,
public_key, public_key_length, public_key, public_key_length,
@ -537,6 +537,15 @@ psa_status_t mbedtls_test_psa_raw_key_agreement_with_self(
status = psa_raw_key_agreement( alg, key, status = psa_raw_key_agreement( alg, key,
public_key, public_key_length, public_key, public_key_length,
output, sizeof( output ), &output_length ); output, sizeof( output ), &output_length );
if ( status == PSA_SUCCESS )
{
TEST_ASSERT( output_length <=
PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE( private_key_type,
key_bits ) );
TEST_ASSERT( output_length <=
PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE );
}
exit: exit:
/* /*
* Key attributes may have been returned by psa_get_key_attributes() * Key attributes may have been returned by psa_get_key_attributes()
@ -644,6 +653,8 @@ int mbedtls_test_psa_exported_key_sanity_check(
if( ! mbedtls_test_asn1_skip_integer( &p, end, 1, bits / 2 + 1, 0 ) ) if( ! mbedtls_test_asn1_skip_integer( &p, end, 1, bits / 2 + 1, 0 ) )
goto exit; goto exit;
TEST_EQUAL( p, end ); TEST_EQUAL( p, end );
TEST_ASSERT( exported_length <= PSA_EXPORT_KEY_PAIR_MAX_SIZE );
} }
else else
#endif /* MBEDTLS_RSA_C */ #endif /* MBEDTLS_RSA_C */
@ -653,6 +664,8 @@ int mbedtls_test_psa_exported_key_sanity_check(
{ {
/* Just the secret value */ /* Just the secret value */
TEST_EQUAL( exported_length, PSA_BITS_TO_BYTES( bits ) ); TEST_EQUAL( exported_length, PSA_BITS_TO_BYTES( bits ) );
TEST_ASSERT( exported_length <= PSA_EXPORT_KEY_PAIR_MAX_SIZE );
} }
else else
#endif /* MBEDTLS_ECP_C */ #endif /* MBEDTLS_ECP_C */
@ -677,6 +690,12 @@ int mbedtls_test_psa_exported_key_sanity_check(
if( ! mbedtls_test_asn1_skip_integer( &p, end, 2, bits, 1 ) ) if( ! mbedtls_test_asn1_skip_integer( &p, end, 2, bits, 1 ) )
goto exit; goto exit;
TEST_EQUAL( p, end ); TEST_EQUAL( p, end );
TEST_ASSERT( exported_length <=
PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE( type, bits ) );
TEST_ASSERT( exported_length <=
PSA_EXPORT_PUBLIC_KEY_MAX_SIZE );
} }
else else
#endif /* MBEDTLS_RSA_C */ #endif /* MBEDTLS_RSA_C */
@ -684,6 +703,12 @@ int mbedtls_test_psa_exported_key_sanity_check(
#if defined(MBEDTLS_ECP_C) #if defined(MBEDTLS_ECP_C)
if( PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY( type ) ) if( PSA_KEY_TYPE_IS_ECC_PUBLIC_KEY( type ) )
{ {
TEST_ASSERT( exported_length <=
PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE( type, bits ) );
TEST_ASSERT( exported_length <=
PSA_EXPORT_PUBLIC_KEY_MAX_SIZE );
if( PSA_KEY_TYPE_ECC_GET_FAMILY( type ) == PSA_ECC_FAMILY_MONTGOMERY ) if( PSA_KEY_TYPE_ECC_GET_FAMILY( type ) == PSA_ECC_FAMILY_MONTGOMERY )
{ {
/* The representation of an ECC Montgomery public key is /* The representation of an ECC Montgomery public key is
@ -804,7 +829,7 @@ static int exercise_export_public_key( mbedtls_svc_key_id_t key )
public_type = PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR( public_type = PSA_KEY_TYPE_PUBLIC_KEY_OF_KEY_PAIR(
psa_get_key_type( &attributes ) ); psa_get_key_type( &attributes ) );
exported_size = PSA_EXPORT_KEY_OUTPUT_SIZE( public_type, exported_size = PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE( public_type,
psa_get_key_bits( &attributes ) ); psa_get_key_bits( &attributes ) );
ASSERT_ALLOC( exported, exported_size ); ASSERT_ALLOC( exported, exported_size );

190
tests/suites/test_suite_psa_crypto.function
View file

@ -613,7 +613,10 @@ void import_export( data_t *data,
reexported, reexported_length ); reexported, reexported_length );
PSA_ASSERT( psa_destroy_key( key2 ) ); PSA_ASSERT( psa_destroy_key( key2 ) );
} }
TEST_ASSERT( exported_length <= PSA_EXPORT_KEY_OUTPUT_SIZE( type, psa_get_key_bits( &got_attributes ) ) ); TEST_ASSERT( exported_length <=
PSA_EXPORT_KEY_OUTPUT_SIZE( type,
psa_get_key_bits( &got_attributes ) ) );
TEST_ASSERT( exported_length <= PSA_EXPORT_KEY_PAIR_MAX_SIZE );
destroy: destroy:
/* Destroy the key */ /* Destroy the key */
@ -674,6 +677,10 @@ void import_export_public_key( data_t *data,
bits = psa_get_key_bits( &attributes ); bits = psa_get_key_bits( &attributes );
TEST_ASSERT( expected_public_key->len <= TEST_ASSERT( expected_public_key->len <=
PSA_EXPORT_KEY_OUTPUT_SIZE( public_type, bits ) ); PSA_EXPORT_KEY_OUTPUT_SIZE( public_type, bits ) );
TEST_ASSERT( expected_public_key->len <=
PSA_EXPORT_PUBLIC_KEY_OUTPUT_SIZE( public_type, bits ) );
TEST_ASSERT( expected_public_key->len <=
PSA_EXPORT_PUBLIC_KEY_MAX_SIZE );
ASSERT_COMPARE( expected_public_key->x, expected_public_key->len, ASSERT_COMPARE( expected_public_key->x, expected_public_key->len,
exported, exported_length ); exported, exported_length );
} }
@ -2403,19 +2410,29 @@ void cipher_encrypt( int alg_arg, int key_type_arg,
PSA_ASSERT( psa_cipher_set_iv( &operation, iv->x, iv->len ) ); PSA_ASSERT( psa_cipher_set_iv( &operation, iv->x, iv->len ) );
} }
output_buffer_size = ( (size_t) input->len + output_buffer_size = PSA_CIPHER_ENCRYPT_OUTPUT_SIZE( key_type, alg, input->len );
PSA_BLOCK_CIPHER_BLOCK_LENGTH( key_type ) ); TEST_ASSERT( output_buffer_size <=
PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE( input->len ) );
ASSERT_ALLOC( output, output_buffer_size ); ASSERT_ALLOC( output, output_buffer_size );
PSA_ASSERT( psa_cipher_update( &operation, PSA_ASSERT( psa_cipher_update( &operation,
input->x, input->len, input->x, input->len,
output, output_buffer_size, output, output_buffer_size,
&function_output_length ) ); &function_output_length ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type, alg, input->len ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( input->len ) );
total_output_length += function_output_length; total_output_length += function_output_length;
status = psa_cipher_finish( &operation, status = psa_cipher_finish( &operation,
output + total_output_length, output + total_output_length,
output_buffer_size - total_output_length, output_buffer_size - total_output_length,
&function_output_length ); &function_output_length );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_FINISH_OUTPUT_SIZE( key_type, alg ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE );
total_output_length += function_output_length; total_output_length += function_output_length;
TEST_EQUAL( status, expected_status ); TEST_EQUAL( status, expected_status );
@ -2471,8 +2488,9 @@ void cipher_encrypt_multipart( int alg_arg, int key_type_arg,
PSA_ASSERT( psa_cipher_set_iv( &operation, iv->x, iv->len ) ); PSA_ASSERT( psa_cipher_set_iv( &operation, iv->x, iv->len ) );
} }
output_buffer_size = ( (size_t) input->len + output_buffer_size = PSA_CIPHER_ENCRYPT_OUTPUT_SIZE( key_type, alg, input->len );
PSA_BLOCK_CIPHER_BLOCK_LENGTH( key_type ) ); TEST_ASSERT( output_buffer_size <=
PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE( input->len ) );
ASSERT_ALLOC( output, output_buffer_size ); ASSERT_ALLOC( output, output_buffer_size );
TEST_ASSERT( first_part_size <= input->len ); TEST_ASSERT( first_part_size <= input->len );
@ -2480,7 +2498,12 @@ void cipher_encrypt_multipart( int alg_arg, int key_type_arg,
output, output_buffer_size, output, output_buffer_size,
&function_output_length ) ); &function_output_length ) );
TEST_ASSERT( function_output_length == output1_length ); TEST_ASSERT( function_output_length == output1_length );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type, alg, first_part_size ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( first_part_size) );
total_output_length += function_output_length; total_output_length += function_output_length;
PSA_ASSERT( psa_cipher_update( &operation, PSA_ASSERT( psa_cipher_update( &operation,
input->x + first_part_size, input->x + first_part_size,
input->len - first_part_size, input->len - first_part_size,
@ -2488,11 +2511,22 @@ void cipher_encrypt_multipart( int alg_arg, int key_type_arg,
output_buffer_size - total_output_length, output_buffer_size - total_output_length,
&function_output_length ) ); &function_output_length ) );
TEST_ASSERT( function_output_length == output2_length ); TEST_ASSERT( function_output_length == output2_length );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type,
alg,
input->len - first_part_size ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( input->len ) );
total_output_length += function_output_length; total_output_length += function_output_length;
PSA_ASSERT( psa_cipher_finish( &operation, PSA_ASSERT( psa_cipher_finish( &operation,
output + total_output_length, output + total_output_length,
output_buffer_size - total_output_length, output_buffer_size - total_output_length,
&function_output_length ) ); &function_output_length ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_FINISH_OUTPUT_SIZE( key_type, alg ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE );
total_output_length += function_output_length; total_output_length += function_output_length;
PSA_ASSERT( psa_cipher_abort( &operation ) ); PSA_ASSERT( psa_cipher_abort( &operation ) );
@ -2544,8 +2578,9 @@ void cipher_decrypt_multipart( int alg_arg, int key_type_arg,
PSA_ASSERT( psa_cipher_set_iv( &operation, iv->x, iv->len ) ); PSA_ASSERT( psa_cipher_set_iv( &operation, iv->x, iv->len ) );
} }
output_buffer_size = ( (size_t) input->len + output_buffer_size = PSA_CIPHER_DECRYPT_OUTPUT_SIZE( key_type, alg, input->len );
PSA_BLOCK_CIPHER_BLOCK_LENGTH( key_type ) ); TEST_ASSERT( output_buffer_size <=
PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE( input->len ) );
ASSERT_ALLOC( output, output_buffer_size ); ASSERT_ALLOC( output, output_buffer_size );
TEST_ASSERT( first_part_size <= input->len ); TEST_ASSERT( first_part_size <= input->len );
@ -2554,7 +2589,12 @@ void cipher_decrypt_multipart( int alg_arg, int key_type_arg,
output, output_buffer_size, output, output_buffer_size,
&function_output_length ) ); &function_output_length ) );
TEST_ASSERT( function_output_length == output1_length ); TEST_ASSERT( function_output_length == output1_length );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type, alg, first_part_size ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( first_part_size ) );
total_output_length += function_output_length; total_output_length += function_output_length;
PSA_ASSERT( psa_cipher_update( &operation, PSA_ASSERT( psa_cipher_update( &operation,
input->x + first_part_size, input->x + first_part_size,
input->len - first_part_size, input->len - first_part_size,
@ -2562,11 +2602,22 @@ void cipher_decrypt_multipart( int alg_arg, int key_type_arg,
output_buffer_size - total_output_length, output_buffer_size - total_output_length,
&function_output_length ) ); &function_output_length ) );
TEST_ASSERT( function_output_length == output2_length ); TEST_ASSERT( function_output_length == output2_length );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type,
alg,
input->len - first_part_size ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( input->len ) );
total_output_length += function_output_length; total_output_length += function_output_length;
PSA_ASSERT( psa_cipher_finish( &operation, PSA_ASSERT( psa_cipher_finish( &operation,
output + total_output_length, output + total_output_length,
output_buffer_size - total_output_length, output_buffer_size - total_output_length,
&function_output_length ) ); &function_output_length ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_FINISH_OUTPUT_SIZE( key_type, alg ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE );
total_output_length += function_output_length; total_output_length += function_output_length;
PSA_ASSERT( psa_cipher_abort( &operation ) ); PSA_ASSERT( psa_cipher_abort( &operation ) );
@ -2615,19 +2666,29 @@ void cipher_decrypt( int alg_arg, int key_type_arg,
PSA_ASSERT( psa_cipher_set_iv( &operation, iv->x, iv->len ) ); PSA_ASSERT( psa_cipher_set_iv( &operation, iv->x, iv->len ) );
} }
output_buffer_size = ( (size_t) input->len + output_buffer_size = PSA_CIPHER_DECRYPT_OUTPUT_SIZE( key_type, alg, input->len );
PSA_BLOCK_CIPHER_BLOCK_LENGTH( key_type ) ); TEST_ASSERT( output_buffer_size <=
PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE( input->len ) );
ASSERT_ALLOC( output, output_buffer_size ); ASSERT_ALLOC( output, output_buffer_size );
PSA_ASSERT( psa_cipher_update( &operation, PSA_ASSERT( psa_cipher_update( &operation,
input->x, input->len, input->x, input->len,
output, output_buffer_size, output, output_buffer_size,
&function_output_length ) ); &function_output_length ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type, alg, input->len ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( input->len ) );
total_output_length += function_output_length; total_output_length += function_output_length;
status = psa_cipher_finish( &operation, status = psa_cipher_finish( &operation,
output + total_output_length, output + total_output_length,
output_buffer_size - total_output_length, output_buffer_size - total_output_length,
&function_output_length ); &function_output_length );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_FINISH_OUTPUT_SIZE( key_type, alg ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE );
total_output_length += function_output_length; total_output_length += function_output_length;
TEST_EQUAL( status, expected_status ); TEST_EQUAL( status, expected_status );
@ -2686,23 +2747,37 @@ void cipher_verify_output( int alg_arg, int key_type_arg,
iv, iv_size, iv, iv_size,
&iv_length ) ); &iv_length ) );
} }
output1_size = ( (size_t) input->len + output1_size = PSA_CIPHER_ENCRYPT_OUTPUT_SIZE( key_type, alg, input->len );
PSA_BLOCK_CIPHER_BLOCK_LENGTH( key_type ) ); TEST_ASSERT( output1_size <=
PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE( input->len ) );
ASSERT_ALLOC( output1, output1_size ); ASSERT_ALLOC( output1, output1_size );
PSA_ASSERT( psa_cipher_update( &operation1, input->x, input->len, PSA_ASSERT( psa_cipher_update( &operation1, input->x, input->len,
output1, output1_size, output1, output1_size,
&output1_length ) ); &output1_length ) );
TEST_ASSERT( output1_length <=
PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type, alg, input->len ) );
TEST_ASSERT( output1_length <=
PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( input->len ) );
PSA_ASSERT( psa_cipher_finish( &operation1, PSA_ASSERT( psa_cipher_finish( &operation1,
output1 + output1_length, output1 + output1_length,
output1_size - output1_length, output1_size - output1_length,
&function_output_length ) ); &function_output_length ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_FINISH_OUTPUT_SIZE( key_type, alg ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE );
output1_length += function_output_length; output1_length += function_output_length;
PSA_ASSERT( psa_cipher_abort( &operation1 ) ); PSA_ASSERT( psa_cipher_abort( &operation1 ) );
output2_size = output1_length; output2_size = output1_length;
TEST_ASSERT( output2_size <=
PSA_CIPHER_DECRYPT_OUTPUT_SIZE( key_type, alg, output1_length ) );
TEST_ASSERT( output2_size <=
PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE( output1_length ) );
ASSERT_ALLOC( output2, output2_size ); ASSERT_ALLOC( output2, output2_size );
if( iv_length > 0 ) if( iv_length > 0 )
@ -2714,11 +2789,20 @@ void cipher_verify_output( int alg_arg, int key_type_arg,
PSA_ASSERT( psa_cipher_update( &operation2, output1, output1_length, PSA_ASSERT( psa_cipher_update( &operation2, output1, output1_length,
output2, output2_size, output2, output2_size,
&output2_length ) ); &output2_length ) );
TEST_ASSERT( output2_length <=
PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type, alg, output1_length ) );
TEST_ASSERT( output2_length <=
PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( output1_length ) );
function_output_length = 0; function_output_length = 0;
PSA_ASSERT( psa_cipher_finish( &operation2, PSA_ASSERT( psa_cipher_finish( &operation2,
output2 + output2_length, output2 + output2_length,
output2_size - output2_length, output2_size - output2_length,
&function_output_length ) ); &function_output_length ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_FINISH_OUTPUT_SIZE( key_type, alg ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE );
output2_length += function_output_length; output2_length += function_output_length;
@ -2780,8 +2864,9 @@ void cipher_verify_output_multipart( int alg_arg,
&iv_length ) ); &iv_length ) );
} }
output1_buffer_size = ( (size_t) input->len + output1_buffer_size = PSA_CIPHER_ENCRYPT_OUTPUT_SIZE( key_type, alg, input->len );
PSA_BLOCK_CIPHER_BLOCK_LENGTH( key_type ) ); TEST_ASSERT( output1_buffer_size <=
PSA_CIPHER_ENCRYPT_OUTPUT_MAX_SIZE( input->len ) );
ASSERT_ALLOC( output1, output1_buffer_size ); ASSERT_ALLOC( output1, output1_buffer_size );
TEST_ASSERT( first_part_size <= input->len ); TEST_ASSERT( first_part_size <= input->len );
@ -2789,6 +2874,10 @@ void cipher_verify_output_multipart( int alg_arg,
PSA_ASSERT( psa_cipher_update( &operation1, input->x, first_part_size, PSA_ASSERT( psa_cipher_update( &operation1, input->x, first_part_size,
output1, output1_buffer_size, output1, output1_buffer_size,
&function_output_length ) ); &function_output_length ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type, alg, first_part_size ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( first_part_size ) );
output1_length += function_output_length; output1_length += function_output_length;
PSA_ASSERT( psa_cipher_update( &operation1, PSA_ASSERT( psa_cipher_update( &operation1,
@ -2796,17 +2885,31 @@ void cipher_verify_output_multipart( int alg_arg,
input->len - first_part_size, input->len - first_part_size,
output1, output1_buffer_size, output1, output1_buffer_size,
&function_output_length ) ); &function_output_length ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type,
alg,
input->len - first_part_size ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( input->len - first_part_size ) );
output1_length += function_output_length; output1_length += function_output_length;
PSA_ASSERT( psa_cipher_finish( &operation1, PSA_ASSERT( psa_cipher_finish( &operation1,
output1 + output1_length, output1 + output1_length,
output1_buffer_size - output1_length, output1_buffer_size - output1_length,
&function_output_length ) ); &function_output_length ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_FINISH_OUTPUT_SIZE( key_type, alg ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE );
output1_length += function_output_length; output1_length += function_output_length;
PSA_ASSERT( psa_cipher_abort( &operation1 ) ); PSA_ASSERT( psa_cipher_abort( &operation1 ) );
output2_buffer_size = output1_length; output2_buffer_size = output1_length;
TEST_ASSERT( output2_buffer_size <=
PSA_CIPHER_DECRYPT_OUTPUT_SIZE( key_type, alg, output1_length ) );
TEST_ASSERT( output2_buffer_size <=
PSA_CIPHER_DECRYPT_OUTPUT_MAX_SIZE( output1_length ) );
ASSERT_ALLOC( output2, output2_buffer_size ); ASSERT_ALLOC( output2, output2_buffer_size );
if( iv_length > 0 ) if( iv_length > 0 )
@ -2818,6 +2921,10 @@ void cipher_verify_output_multipart( int alg_arg,
PSA_ASSERT( psa_cipher_update( &operation2, output1, first_part_size, PSA_ASSERT( psa_cipher_update( &operation2, output1, first_part_size,
output2, output2_buffer_size, output2, output2_buffer_size,
&function_output_length ) ); &function_output_length ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type, alg, first_part_size ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( first_part_size ) );
output2_length += function_output_length; output2_length += function_output_length;
PSA_ASSERT( psa_cipher_update( &operation2, PSA_ASSERT( psa_cipher_update( &operation2,
@ -2825,12 +2932,22 @@ void cipher_verify_output_multipart( int alg_arg,
output1_length - first_part_size, output1_length - first_part_size,
output2, output2_buffer_size, output2, output2_buffer_size,
&function_output_length ) ); &function_output_length ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_UPDATE_OUTPUT_SIZE( key_type,
alg,
output1_length - first_part_size ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_UPDATE_OUTPUT_MAX_SIZE( output1_length - first_part_size ) );
output2_length += function_output_length; output2_length += function_output_length;
PSA_ASSERT( psa_cipher_finish( &operation2, PSA_ASSERT( psa_cipher_finish( &operation2,
output2 + output2_length, output2 + output2_length,
output2_buffer_size - output2_length, output2_buffer_size - output2_length,
&function_output_length ) ); &function_output_length ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_FINISH_OUTPUT_SIZE( key_type, alg ) );
TEST_ASSERT( function_output_length <=
PSA_CIPHER_FINISH_OUTPUT_MAX_SIZE );
output2_length += function_output_length; output2_length += function_output_length;
PSA_ASSERT( psa_cipher_abort( &operation2 ) ); PSA_ASSERT( psa_cipher_abort( &operation2 ) );
@ -2913,6 +3030,9 @@ void aead_encrypt_decrypt( int key_type_arg, data_t *key_data,
TEST_EQUAL( input_data->len, TEST_EQUAL( input_data->len,
PSA_AEAD_DECRYPT_OUTPUT_SIZE( alg, output_length ) ); PSA_AEAD_DECRYPT_OUTPUT_SIZE( alg, output_length ) );
TEST_ASSERT( input_data->len <=
PSA_AEAD_DECRYPT_OUTPUT_MAX_SIZE( output_length ) );
TEST_EQUAL( psa_aead_decrypt( key, alg, TEST_EQUAL( psa_aead_decrypt( key, alg,
nonce->x, nonce->len, nonce->x, nonce->len,
additional_data->x, additional_data->x,
@ -2957,6 +3077,8 @@ void aead_encrypt( int key_type_arg, data_t *key_data,
* should be exact. */ * should be exact. */
TEST_EQUAL( output_size, TEST_EQUAL( output_size,
PSA_AEAD_ENCRYPT_OUTPUT_SIZE( alg, input_data->len ) ); PSA_AEAD_ENCRYPT_OUTPUT_SIZE( alg, input_data->len ) );
TEST_ASSERT( output_size <=
PSA_AEAD_ENCRYPT_OUTPUT_MAX_SIZE( input_data->len ) );
ASSERT_ALLOC( output_data, output_size ); ASSERT_ALLOC( output_data, output_size );
PSA_ASSERT( psa_crypto_init( ) ); PSA_ASSERT( psa_crypto_init( ) );
@ -3016,11 +3138,15 @@ void aead_decrypt( int key_type_arg, data_t *key_data,
psa_status_t status = PSA_ERROR_GENERIC_ERROR; psa_status_t status = PSA_ERROR_GENERIC_ERROR;
output_size = input_data->len - tag_length; output_size = input_data->len - tag_length;
if( expected_result != PSA_ERROR_INVALID_ARGUMENT )
{
/* For all currently defined algorithms, PSA_AEAD_DECRYPT_OUTPUT_SIZE /* For all currently defined algorithms, PSA_AEAD_DECRYPT_OUTPUT_SIZE
* should be exact. */ * should be exact. */
if( expected_result != PSA_ERROR_INVALID_ARGUMENT )
TEST_EQUAL( output_size, TEST_EQUAL( output_size,
PSA_AEAD_DECRYPT_OUTPUT_SIZE( alg, input_data->len ) ); PSA_AEAD_DECRYPT_OUTPUT_SIZE( alg, input_data->len ) );
TEST_ASSERT( output_size <=
PSA_AEAD_DECRYPT_OUTPUT_MAX_SIZE( input_data->len ) );
}
ASSERT_ALLOC( output_data, output_size ); ASSERT_ALLOC( output_data, output_size );
PSA_ASSERT( psa_crypto_init( ) ); PSA_ASSERT( psa_crypto_init( ) );
@ -3389,7 +3515,9 @@ void asymmetric_encrypt( int key_type_arg,
/* Determine the maximum output length */ /* Determine the maximum output length */
PSA_ASSERT( psa_get_key_attributes( key, &attributes ) ); PSA_ASSERT( psa_get_key_attributes( key, &attributes ) );
key_bits = psa_get_key_bits( &attributes ); key_bits = psa_get_key_bits( &attributes );
output_size = PSA_ASYMMETRIC_ENCRYPT_OUTPUT_SIZE( key_type, key_bits, alg ); output_size = PSA_ASYMMETRIC_ENCRYPT_OUTPUT_SIZE( key_type, key_bits, alg );
TEST_ASSERT( output_size <= PSA_ASYMMETRIC_ENCRYPT_OUTPUT_MAX_SIZE );
ASSERT_ALLOC( output, output_size ); ASSERT_ALLOC( output, output_size );
/* Encrypt the input */ /* Encrypt the input */
@ -3461,9 +3589,15 @@ void asymmetric_encrypt_decrypt( int key_type_arg,
/* Determine the maximum ciphertext length */ /* Determine the maximum ciphertext length */
PSA_ASSERT( psa_get_key_attributes( key, &attributes ) ); PSA_ASSERT( psa_get_key_attributes( key, &attributes ) );
key_bits = psa_get_key_bits( &attributes ); key_bits = psa_get_key_bits( &attributes );
output_size = PSA_ASYMMETRIC_ENCRYPT_OUTPUT_SIZE( key_type, key_bits, alg ); output_size = PSA_ASYMMETRIC_ENCRYPT_OUTPUT_SIZE( key_type, key_bits, alg );
TEST_ASSERT( output_size <= PSA_ASYMMETRIC_ENCRYPT_OUTPUT_MAX_SIZE );
ASSERT_ALLOC( output, output_size ); ASSERT_ALLOC( output, output_size );
output2_size = input_data->len; output2_size = input_data->len;
TEST_ASSERT( output2_size <=
PSA_ASYMMETRIC_DECRYPT_OUTPUT_SIZE( key_type, key_bits, alg ) );
TEST_ASSERT( output2_size <= PSA_ASYMMETRIC_DECRYPT_OUTPUT_MAX_SIZE );
ASSERT_ALLOC( output2, output2_size ); ASSERT_ALLOC( output2, output2_size );
/* We test encryption by checking that encrypt-then-decrypt gives back /* We test encryption by checking that encrypt-then-decrypt gives back
@ -3511,14 +3645,12 @@ void asymmetric_decrypt( int key_type_arg,
mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT; mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT;
psa_key_type_t key_type = key_type_arg; psa_key_type_t key_type = key_type_arg;
psa_algorithm_t alg = alg_arg; psa_algorithm_t alg = alg_arg;
size_t key_bits;
unsigned char *output = NULL; unsigned char *output = NULL;
size_t output_size = 0; size_t output_size = 0;
size_t output_length = ~0; size_t output_length = ~0;
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
output_size = expected_data->len;
ASSERT_ALLOC( output, output_size );
PSA_ASSERT( psa_crypto_init( ) ); PSA_ASSERT( psa_crypto_init( ) );
psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_DECRYPT ); psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_DECRYPT );
@ -3528,6 +3660,14 @@ void asymmetric_decrypt( int key_type_arg,
PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len, PSA_ASSERT( psa_import_key( &attributes, key_data->x, key_data->len,
&key ) ); &key ) );
PSA_ASSERT( psa_get_key_attributes( key, &attributes ) );
key_bits = psa_get_key_bits( &attributes );
/* Determine the maximum ciphertext length */
output_size = PSA_ASYMMETRIC_DECRYPT_OUTPUT_SIZE( key_type, key_bits, alg );
TEST_ASSERT( output_size <= PSA_ASYMMETRIC_DECRYPT_OUTPUT_MAX_SIZE );
ASSERT_ALLOC( output, output_size );
PSA_ASSERT( psa_asymmetric_decrypt( key, alg, PSA_ASSERT( psa_asymmetric_decrypt( key, alg,
input_data->x, input_data->len, input_data->x, input_data->len,
label->x, label->len, label->x, label->len,
@ -3925,6 +4065,14 @@ void derive_output( int alg_arg,
PSA_ASSERT( psa_import_key( &attributes, PSA_ASSERT( psa_import_key( &attributes,
inputs[i]->x, inputs[i]->len, inputs[i]->x, inputs[i]->len,
&keys[i] ) ); &keys[i] ) );
if ( PSA_ALG_IS_TLS12_PSK_TO_MS( alg ) )
{
PSA_ASSERT( psa_get_key_attributes( keys[i], &attributes ) );
TEST_ASSERT( PSA_BITS_TO_BYTES( psa_get_key_bits( &attributes ) ) <=
PSA_TLS12_PSK_TO_MS_PSK_MAX_SIZE );
}
PSA_ASSERT( psa_key_derivation_input_key( PSA_ASSERT( psa_key_derivation_input_key(
&operation, steps[i], keys[i] ) ); &operation, steps[i], keys[i] ) );
break; break;
@ -4310,6 +4458,7 @@ void raw_key_agreement( int alg_arg,
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
unsigned char *output = NULL; unsigned char *output = NULL;
size_t output_length = ~0; size_t output_length = ~0;
size_t key_bits;
ASSERT_ALLOC( output, expected_output->len ); ASSERT_ALLOC( output, expected_output->len );
PSA_ASSERT( psa_crypto_init( ) ); PSA_ASSERT( psa_crypto_init( ) );
@ -4321,12 +4470,19 @@ void raw_key_agreement( int alg_arg,
our_key_data->x, our_key_data->len, our_key_data->x, our_key_data->len,
&our_key ) ); &our_key ) );
PSA_ASSERT( psa_get_key_attributes( our_key, &attributes ) );
key_bits = psa_get_key_bits( &attributes );
PSA_ASSERT( psa_raw_key_agreement( alg, our_key, PSA_ASSERT( psa_raw_key_agreement( alg, our_key,
peer_key_data->x, peer_key_data->len, peer_key_data->x, peer_key_data->len,
output, expected_output->len, output, expected_output->len,
&output_length ) ); &output_length ) );
ASSERT_COMPARE( output, output_length, ASSERT_COMPARE( output, output_length,
expected_output->x, expected_output->len ); expected_output->x, expected_output->len );
TEST_ASSERT( output_length <=
PSA_RAW_KEY_AGREEMENT_OUTPUT_SIZE( our_key_type, key_bits ) );
TEST_ASSERT( output_length <=
PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE );
exit: exit:
mbedtls_free( output ); mbedtls_free( output );