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Add version of MBEDTLS_X509_SAFE_SNPRINTF supporting cleanup section

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This will be needed in debugging functions that maintain heap
allocated state, and which hence needs to be freed in case an
`snprintf()` call fails.
This commit is contained in:
Hanno Becker 2019-02-23 12:12:46 +00:00
parent 45eedf1ace
commit 343fec08ad
1 changed files with 12 additions and 0 deletions
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12
include/mbedtls/x509.h
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@ -355,6 +355,18 @@ int mbedtls_x509_write_sig( unsigned char **p, unsigned char *start,
p += (size_t) ret; \ p += (size_t) ret; \
} while( 0 ) } while( 0 )
#define MBEDTLS_X509_SAFE_SNPRINTF_WITH_CLEANUP \
do { \
if( ret < 0 || (size_t) ret >= n ) \
{ \
ret = MBEDTLS_ERR_X509_BUFFER_TOO_SMALL; \
goto cleanup; \
} \
\
n -= (size_t) ret; \
p += (size_t) ret; \
} while( 0 )
#ifdef __cplusplus #ifdef __cplusplus
} }
#endif #endif