Merge pull request #3150 from irwir/fix_ssl_srv
Simplify checks in ssl_write_certificate_request
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commit
6bd4c79999
1 changed files with 5 additions and 5 deletions
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@ -2841,7 +2841,7 @@ static int ssl_write_certificate_request( mbedtls_ssl_context *ssl )
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int ret = MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE;
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const mbedtls_ssl_ciphersuite_t *ciphersuite_info =
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ssl->handshake->ciphersuite_info;
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size_t dn_size, total_dn_size; /* excluding length bytes */
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uint16_t dn_size, total_dn_size; /* excluding length bytes */
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size_t ct_len, sa_len; /* including length bytes */
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unsigned char *buf, *p;
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const unsigned char * const end = ssl->out_msg + MBEDTLS_SSL_OUT_CONTENT_LEN;
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@ -2969,11 +2969,11 @@ static int ssl_write_certificate_request( mbedtls_ssl_context *ssl )
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while( crt != NULL && crt->version != 0 )
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{
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dn_size = crt->subject_raw.len;
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/* It follows from RFC 5280 A.1 that this length
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* can be represented in at most 11 bits. */
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dn_size = (uint16_t) crt->subject_raw.len;
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if( end < p ||
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(size_t)( end - p ) < dn_size ||
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(size_t)( end - p ) < 2 + dn_size )
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if( end < p || (size_t)( end - p ) < 2 + (size_t) dn_size )
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{
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MBEDTLS_SSL_DEBUG_MSG( 1, ( "skipping CAs: buffer too short" ) );
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break;
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