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- Fixed missing support for SHA2 in rsa_pkcs1_sign()

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This commit is contained in:
Paul Bakker 2009-05-17 10:11:56 +00:00
parent 860d36b9d8
commit cde51572df
1 changed files with 26 additions and 9 deletions
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35
library/rsa.c
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@ -333,7 +333,7 @@ int rsa_pkcs1_decrypt( rsa_context *ctx,
{ {
int ret, ilen; int ret, ilen;
unsigned char *p; unsigned char *p;
unsigned char buf[512]; unsigned char buf[1024];
ilen = ctx->len; ilen = ctx->len;
@ -414,6 +414,23 @@ int rsa_pkcs1_sign( rsa_context *ctx,
nb_pad = olen - 3 - 35; nb_pad = olen - 3 - 35;
break; break;
case SIG_RSA_SHA224:
nb_pad = olen - 3 - 47;
break;
case SIG_RSA_SHA256:
nb_pad = olen - 3 - 51;
break;
case SIG_RSA_SHA384:
nb_pad = olen - 3 - 67;
break;
case SIG_RSA_SHA512:
nb_pad = olen - 3 - 83;
break;
default: default:
return( POLARSSL_ERR_RSA_BAD_INPUT_DATA ); return( POLARSSL_ERR_RSA_BAD_INPUT_DATA );
} }
@ -500,7 +517,7 @@ int rsa_pkcs1_verify( rsa_context *ctx,
{ {
int ret, len, siglen; int ret, len, siglen;
unsigned char *p, c; unsigned char *p, c;
unsigned char buf[512]; unsigned char buf[1024];
siglen = ctx->len; siglen = ctx->len;
@ -572,15 +589,15 @@ int rsa_pkcs1_verify( rsa_context *ctx,
( len == 19 + 64 && p[14] == 3 && hash_id == SIG_RSA_SHA512 ) ) ( len == 19 + 64 && p[14] == 3 && hash_id == SIG_RSA_SHA512 ) )
{ {
c = p[1] - 17; c = p[1] - 17;
p[1] = 17; p[1] = 17;
p[14] = 0; p[14] = 0;
if( p[18] == c && if( p[18] == c &&
memcmp( p, ASN1_HASH_SHA2X, 18 ) == 0 && memcmp( p, ASN1_HASH_SHA2X, 18 ) == 0 &&
memcmp( p + 19, hash, c ) == 0 ) memcmp( p + 19, hash, c ) == 0 )
return( 0 ); return( 0 );
else else
return( POLARSSL_ERR_RSA_VERIFY_FAILED ); return( POLARSSL_ERR_RSA_VERIFY_FAILED );
} }
if( len == hashlen && hash_id == RSA_RAW ) if( len == hashlen && hash_id == RSA_RAW )