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IDEA removed, signing works

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This commit is contained in:
Werner Koch 1997-11-24 11:04:11 +00:00
parent db19a27518
commit a51cca90b6
30 changed files with 428 additions and 654 deletions
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64
g10/sig-check.c
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@ -115,28 +115,27 @@ signature_check( PKT_signature *sig, MD_HANDLE digest )
{ 0x10, 0x04, 0x00, 0x05, 0x05, 0x02, 0x0d, 0xf7, 0x86,
0x48, 0x86, 0x2a, 0x08, 0x06, 0x0c, 0x30, 0x20, 0x30 };
for(i=20,j=0; j < 18 && (c=mpi_getbyte(result, i)) != -1; i++, j++ )
for(i=20,j=0; (c=mpi_getbyte(result, i)) != -1 && j < 18; i++, j++ )
if( asn[j] != c )
break;
if( j != 18 ) { /* ASN is wrong */
if( j != 18 || c ) { /* ASN is wrong */
rc = G10ERR_BAD_PUBKEY;
goto leave;
}
if( !c ) {
for(; (c=mpi_getbyte(result, i)) != -1; i++ )
if( c != 0xff )
break;
if( c != 42 || mpi_getbyte(result, i) ) {
/* Padding or leading bytes in signature is wrong */
rc = G10ERR_BAD_PUBKEY;
goto leave;
}
if( mpi_getbyte(result, 19) != sig->d.rsa.digest_start[0]
|| mpi_getbyte(result, 18) != sig->d.rsa.digest_start[1] ) {
/* Wrong key used to check the signature */
rc = G10ERR_BAD_PUBKEY;
goto leave;
}
for(i++; (c=mpi_getbyte(result, i)) != -1; i++ )
if( c != 0xff )
break;
i++;
if( c != DIGEST_ALGO_RMD160 || mpi_getbyte(result, i) ) {
/* Padding or leading bytes in signature is wrong */
rc = G10ERR_BAD_PUBKEY;
goto leave;
}
if( mpi_getbyte(result, 19) != sig->d.rsa.digest_start[0]
|| mpi_getbyte(result, 18) != sig->d.rsa.digest_start[1] ) {
/* Wrong key used to check the signature */
rc = G10ERR_BAD_PUBKEY;
goto leave;
}
/* complete the digest */
@ -162,25 +161,24 @@ signature_check( PKT_signature *sig, MD_HANDLE digest )
for(i=16,j=0; j < 18 && (c=mpi_getbyte(result, i)) != -1; i++, j++ )
if( asn[j] != c )
break;
if( j != 18 ) { /* ASN is wrong */
if( j != 18 || c ) { /* ASN is wrong */
rc = G10ERR_BAD_PUBKEY;
goto leave;
}
if( !c ) {
for(; (c=mpi_getbyte(result, i)) != -1; i++ )
if( c != 0xff )
break;
if( c != 1 || mpi_getbyte(result, i) ) {
/* Padding or leading bytes in signature is wrong */
rc = G10ERR_BAD_PUBKEY;
goto leave;
}
if( mpi_getbyte(result, 15) != sig->d.rsa.digest_start[0]
|| mpi_getbyte(result, 14) != sig->d.rsa.digest_start[1] ) {
/* Wrong key used to check the signature */
rc = G10ERR_BAD_PUBKEY;
goto leave;
}
for(i++; (c=mpi_getbyte(result, i)) != -1; i++ )
if( c != 0xff )
break;
i++;
if( c != DIGEST_ALGO_MD5 || mpi_getbyte(result, i) ) {
/* Padding or leading bytes in signature is wrong */
rc = G10ERR_BAD_PUBKEY;
goto leave;
}
if( mpi_getbyte(result, 15) != sig->d.rsa.digest_start[0]
|| mpi_getbyte(result, 14) != sig->d.rsa.digest_start[1] ) {
/* Wrong key used to check the signature */
rc = G10ERR_BAD_PUBKEY;
goto leave;
}
/* complete the digest */