AuroraMiddleware/mbedtls
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Swap C++ comments to C for style consistency in rsa.c

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This commit is contained in:
Simon Butcher 2016-03-01 21:19:12 +00:00
parent 8ddc93f07a
commit 0203745e23
1 changed files with 25 additions and 36 deletions
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61
library/rsa.c
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@ -471,8 +471,7 @@ static void mgf_mask( unsigned char *dst, size_t dlen, unsigned char *src,
hlen = mbedtls_md_get_size( md_ctx->md_info );
// Generate and apply dbMask
//
/* Generate and apply dbMask */
p = dst;
while( dlen > 0 )
@ -529,7 +528,7 @@ int mbedtls_rsa_rsaes_oaep_encrypt( mbedtls_rsa_context *ctx,
olen = ctx->len;
hlen = mbedtls_md_get_size( md_info );
// first comparison checks for overflow
/* first comparison checks for overflow */
if( ilen + 2 * hlen + 2 < ilen || olen < ilen + 2 * hlen + 2 )
return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
@ -537,15 +536,13 @@ int mbedtls_rsa_rsaes_oaep_encrypt( mbedtls_rsa_context *ctx,
*p++ = 0;
// Generate a random octet string seed
//
/* Generate a random octet string seed */
if( ( ret = f_rng( p_rng, p, hlen ) ) != 0 )
return( MBEDTLS_ERR_RSA_RNG_FAILED + ret );
p += hlen;
// Construct DB
//
/* Construct DB */
mbedtls_md( md_info, label, label_len, p );
p += hlen;
p += olen - 2 * hlen - 2 - ilen;
@ -555,13 +552,11 @@ int mbedtls_rsa_rsaes_oaep_encrypt( mbedtls_rsa_context *ctx,
mbedtls_md_init( &md_ctx );
mbedtls_md_setup( &md_ctx, md_info, 0 );
// maskedDB: Apply dbMask to DB
//
/* maskedDB: Apply dbMask to DB */
mgf_mask( output + hlen + 1, olen - hlen - 1, output + 1, hlen,
&md_ctx );
// maskedSeed: Apply seedMask to seed
//
/* maskedSeed: Apply seedMask to seed */
mgf_mask( output + 1, hlen, output + hlen + 1, olen - hlen - 1,
&md_ctx );
@ -596,7 +591,7 @@ int mbedtls_rsa_rsaes_pkcs1_v15_encrypt( mbedtls_rsa_context *ctx,
olen = ctx->len;
// first comparison checks for overflow
/* first comparison checks for overflow */
if( ilen + 11 < ilen || olen < ilen + 11 )
return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
@ -615,8 +610,7 @@ int mbedtls_rsa_rsaes_pkcs1_v15_encrypt( mbedtls_rsa_context *ctx,
ret = f_rng( p_rng, p, 1 );
} while( *p == 0 && --rng_dl && ret == 0 );
// Check if RNG failed to generate data
//
/* Check if RNG failed to generate data */
if( rng_dl == 0 || ret != 0 )
return( MBEDTLS_ERR_RSA_RNG_FAILED + ret );
@ -934,8 +928,7 @@ int mbedtls_rsa_rsassa_pss_sign( mbedtls_rsa_context *ctx,
if( md_alg != MBEDTLS_MD_NONE )
{
// Gather length of hash to sign
//
/* Gather length of hash to sign */
md_info = mbedtls_md_info_from_type( md_alg );
if( md_info == NULL )
return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
@ -955,13 +948,11 @@ int mbedtls_rsa_rsassa_pss_sign( mbedtls_rsa_context *ctx,
memset( sig, 0, olen );
// Generate salt of length slen
//
/* Generate salt of length slen */
if( ( ret = f_rng( p_rng, salt, slen ) ) != 0 )
return( MBEDTLS_ERR_RSA_RNG_FAILED + ret );
// Note: EMSA-PSS encoding is over the length of N - 1 bits
//
/* Note: EMSA-PSS encoding is over the length of N - 1 bits */
msb = mbedtls_mpi_bitlen( &ctx->N ) - 1;
p += olen - hlen * 2 - 2;
*p++ = 0x01;
@ -971,21 +962,18 @@ int mbedtls_rsa_rsassa_pss_sign( mbedtls_rsa_context *ctx,
mbedtls_md_init( &md_ctx );
mbedtls_md_setup( &md_ctx, md_info, 0 );
// Generate H = Hash( M' )
//
/* Generate H = Hash( M' ) */
mbedtls_md_starts( &md_ctx );
mbedtls_md_update( &md_ctx, p, 8 );
mbedtls_md_update( &md_ctx, hash, hashlen );
mbedtls_md_update( &md_ctx, salt, slen );
mbedtls_md_finish( &md_ctx, p );
// Compensate for boundary condition when applying mask
//
/* Compensate for boundary condition when applying mask */
if( msb % 8 == 0 )
offset = 1;
// maskedDB: Apply dbMask to DB
//
/* maskedDB: Apply dbMask to DB */
mgf_mask( sig + offset, olen - hlen - 1 - offset, p, hlen, &md_ctx );
mbedtls_md_free( &md_ctx );
@ -1209,8 +1197,7 @@ int mbedtls_rsa_rsassa_pss_verify_ext( mbedtls_rsa_context *ctx,
if( md_alg != MBEDTLS_MD_NONE )
{
// Gather length of hash to sign
//
/* Gather length of hash to sign */
md_info = mbedtls_md_info_from_type( md_alg );
if( md_info == NULL )
return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
@ -1227,12 +1214,12 @@ int mbedtls_rsa_rsassa_pss_verify_ext( mbedtls_rsa_context *ctx,
memset( zeros, 0, 8 );
// Note: EMSA-PSS verification is over the length of N - 1 bits
//
/*
* Note: EMSA-PSS verification is over the length of N - 1 bits
*/
msb = mbedtls_mpi_bitlen( &ctx->N ) - 1;
// Compensate for boundary condition when applying mask
//
/* Compensate for boundary condition when applying mask */
if( msb % 8 == 0 )
{
p++;
@ -1268,8 +1255,9 @@ int mbedtls_rsa_rsassa_pss_verify_ext( mbedtls_rsa_context *ctx,
return( MBEDTLS_ERR_RSA_INVALID_PADDING );
}
// Generate H = Hash( M' )
//
/*
* Generate H = Hash( M' )
*/
mbedtls_md_starts( &md_ctx );
mbedtls_md_update( &md_ctx, zeros, 8 );
mbedtls_md_update( &md_ctx, hash, hashlen );
@ -1374,8 +1362,9 @@ int mbedtls_rsa_rsassa_pkcs1_v15_verify( mbedtls_rsa_context *ctx,
end = p + len;
// Parse the ASN.1 structure inside the PKCS#1 v1.5 structure
//
/*
* Parse the ASN.1 structure inside the PKCS#1 v1.5 structure
*/
if( ( ret = mbedtls_asn1_get_tag( &p, end, &asn1_len,
MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
return( MBEDTLS_ERR_RSA_VERIFY_FAILED );