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Fix sig->tag update in mbedtls_x509_get_sig()

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Andres AG 2016-09-19 16:58:45 +01:00 committed by Simon Butcher
parent 759b5a1286
commit 6a3fa2159c
2 changed files with 6 additions and 1 deletions
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3
ChangeLog
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@ -22,6 +22,9 @@ Bugfix
* Fix documentation and implementation missmatch for function arguments of * Fix documentation and implementation missmatch for function arguments of
mbedtls_gcm_finish(). Found by cmiatpaar. #602 mbedtls_gcm_finish(). Found by cmiatpaar. #602
* Guarantee that P>Q at RSA key generation. Found by inestlerode. #558 * Guarantee that P>Q at RSA key generation. Found by inestlerode. #558
* Fix mbedtls_x509_get_sig() to update the ASN1 type in the mbedtls_x509_buf
data structure until after error checks are successful. Found by
subramanyam-c.
= mbed TLS 2.1.5 branch released 2016-06-28 = mbed TLS 2.1.5 branch released 2016-06-28

4
library/x509.c
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@ -554,16 +554,18 @@ int mbedtls_x509_get_sig( unsigned char **p, const unsigned char *end, mbedtls_x
{ {
int ret; int ret;
size_t len; size_t len;
int tag_type;
if( ( end - *p ) < 1 ) if( ( end - *p ) < 1 )
return( MBEDTLS_ERR_X509_INVALID_SIGNATURE + return( MBEDTLS_ERR_X509_INVALID_SIGNATURE +
MBEDTLS_ERR_ASN1_OUT_OF_DATA ); MBEDTLS_ERR_ASN1_OUT_OF_DATA );
sig->tag = **p; tag_type = **p;
if( ( ret = mbedtls_asn1_get_bitstring_null( p, end, &len ) ) != 0 ) if( ( ret = mbedtls_asn1_get_bitstring_null( p, end, &len ) ) != 0 )
return( MBEDTLS_ERR_X509_INVALID_SIGNATURE + ret ); return( MBEDTLS_ERR_X509_INVALID_SIGNATURE + ret );
sig->tag = tag_type;
sig->len = len; sig->len = len;
sig->p = *p; sig->p = *p;