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- Added alternative for SHA1 signature structure to check for (without NULL)

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This commit is contained in:
Paul Bakker 2012-03-22 15:31:27 +00:00
parent 7beceb2e2b
commit 56a7684023
2 changed files with 15 additions and 0 deletions
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7
include/polarssl/rsa.h
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@ -114,6 +114,13 @@
ASN1_STR_NULL "\x00" \
ASN1_STR_OCTET_STRING "\x14"
#define ASN1_HASH_SHA1_ALT \
ASN1_STR_CONSTRUCTED_SEQUENCE "\x1F" \
ASN1_STR_CONSTRUCTED_SEQUENCE "\x07" \
ASN1_STR_OID "\x05" \
OID_HASH_ALG_SHA1 \
ASN1_STR_OCTET_STRING "\x14"
#define ASN1_HASH_SHA2X \
ASN1_STR_CONSTRUCTED_SEQUENCE "\x11" \
ASN1_STR_CONSTRUCTED_SEQUENCE "\x0d" \

8
library/rsa.c
View file

@ -860,6 +860,14 @@ int rsa_pkcs1_verify( rsa_context *ctx,
len = siglen - ( p - buf );
if( len == 33 && hash_id == SIG_RSA_SHA1 )
{
if( memcmp( p, ASN1_HASH_SHA1_ALT, 13 ) == 0 &&
memcmp( p + 13, hash, 20 ) == 0 )
return( 0 );
else
return( POLARSSL_ERR_RSA_VERIFY_FAILED );
}
if( len == 34 )
{
c = p[13];