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PK: declare restartable sign/verify functions

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For RSA, we could either have the function return an error code like
NOT_IMPLEMENTED or just run while disregarding ecp_max_ops. IMO the second
option makes more sense, as otherwise the caller would need to check whether
the key is EC or RSA before deciding to call either sign() or
sign_restartable(), and having to do this kind of check feels contrary to the
goal of the PK layer.
This commit is contained in:
Manuel Pégourié-Gonnard
2017-05-03 10:59:45 +02:00
parent fd838dab5c
commit 82cb27b3db
2 changed files with 94 additions and 6 deletions
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43
library/pk.c
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@ -176,12 +176,16 @@ static inline int pk_hashlen_helper( mbedtls_md_type_t md_alg, size_t *hash_len
}
/*
* Verify a signature
* Verify a signature (restartable)
*/
int mbedtls_pk_verify( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
int mbedtls_pk_verify_restartable( mbedtls_pk_context *ctx,
mbedtls_md_type_t md_alg,
const unsigned char *hash, size_t hash_len,
const unsigned char *sig, size_t sig_len )
const unsigned char *sig, size_t sig_len,
void *rs_ctx )
{
(void) rs_ctx; // XXX temporary
if( ctx == NULL || ctx->pk_info == NULL ||
pk_hashlen_helper( md_alg, &hash_len ) != 0 )
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
@ -193,6 +197,17 @@ int mbedtls_pk_verify( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
sig, sig_len ) );
}
/*
* Verify a signature
*/
int mbedtls_pk_verify( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
const unsigned char *hash, size_t hash_len,
const unsigned char *sig, size_t sig_len )
{
return( mbedtls_pk_verify_restartable( ctx, md_alg, hash, hash_len,
sig, sig_len, NULL ) );
}
/*
* Verify a signature with options
*/
@ -252,13 +267,17 @@ int mbedtls_pk_verify_ext( mbedtls_pk_type_t type, const void *options,
}
/*
* Make a signature
* Make a signature (restartable)
*/
int mbedtls_pk_sign( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
int mbedtls_pk_sign_restartable( mbedtls_pk_context *ctx,
mbedtls_md_type_t md_alg,
const unsigned char *hash, size_t hash_len,
unsigned char *sig, size_t *sig_len,
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng,
void *rs_ctx )
{
(void) rs_ctx; // XXX temporary
if( ctx == NULL || ctx->pk_info == NULL ||
pk_hashlen_helper( md_alg, &hash_len ) != 0 )
return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
@ -270,6 +289,18 @@ int mbedtls_pk_sign( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
sig, sig_len, f_rng, p_rng ) );
}
/*
* Make a signature
*/
int mbedtls_pk_sign( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
const unsigned char *hash, size_t hash_len,
unsigned char *sig, size_t *sig_len,
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
{
return( mbedtls_pk_sign_restartable( ctx, md_alg, hash, hash_len,
sig, sig_len, f_rng, p_rng, NULL ) );
}
/*
* Decrypt message
*/