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| author | Niels Möller <nisse@lysator.liu.se> | 2012-06-03 22:02:59 +0200 |
|---|---|---|
| committer | Niels Möller <nisse@lysator.liu.se> | 2012-06-03 22:02:59 +0200 |
| commit | adad6eaac2d03fba830eb1630b5458c1ac7f1907 (patch) | |
| tree | ea02b675e2cf8f3c6584f35f9f73fd0d072b3428 /pkcs1-rsa-sha512.c | |
| parent | 0589865876f8c89047eaee1698071e31956b0480 (diff) | |
| download | nettle-adad6eaac2d03fba830eb1630b5458c1ac7f1907.tar.gz | |
Changes to pkcs1_signature_prefix interface.
Diffstat (limited to 'pkcs1-rsa-sha512.c')
| -rw-r--r-- | pkcs1-rsa-sha512.c | 29 |
1 files changed, 16 insertions, 13 deletions
diff --git a/pkcs1-rsa-sha512.c b/pkcs1-rsa-sha512.c index df7520e5..ddf62769 100644 --- a/pkcs1-rsa-sha512.c +++ b/pkcs1-rsa-sha512.c @@ -60,19 +60,20 @@ sha512_prefix[] = }; int -pkcs1_rsa_sha512_encode(mpz_t m, unsigned size, struct sha512_ctx *hash) +pkcs1_rsa_sha512_encode(mpz_t m, unsigned key_size, struct sha512_ctx *hash) { + uint8_t *p; TMP_DECL(em, uint8_t, NETTLE_MAX_BIGNUM_SIZE); - TMP_ALLOC(em, size); + TMP_ALLOC(em, key_size); - if (pkcs1_signature_prefix(size, em, + p = pkcs1_signature_prefix(key_size, em, sizeof(sha512_prefix), sha512_prefix, - SHA512_DIGEST_SIZE)) + SHA512_DIGEST_SIZE); + if (p) { - sha512_digest(hash, SHA512_DIGEST_SIZE, - em + size - SHA512_DIGEST_SIZE); - nettle_mpz_set_str_256_u(m, size, em); + sha512_digest(hash, SHA512_DIGEST_SIZE, p); + nettle_mpz_set_str_256_u(m, key_size, em); return 1; } else @@ -80,18 +81,20 @@ pkcs1_rsa_sha512_encode(mpz_t m, unsigned size, struct sha512_ctx *hash) } int -pkcs1_rsa_sha512_encode_digest(mpz_t m, unsigned size, const uint8_t *digest) +pkcs1_rsa_sha512_encode_digest(mpz_t m, unsigned key_size, const uint8_t *digest) { + uint8_t *p; TMP_DECL(em, uint8_t, NETTLE_MAX_BIGNUM_SIZE); - TMP_ALLOC(em, size); + TMP_ALLOC(em, key_size); - if (pkcs1_signature_prefix(size, em, + p = pkcs1_signature_prefix(key_size, em, sizeof(sha512_prefix), sha512_prefix, - SHA512_DIGEST_SIZE)) + SHA512_DIGEST_SIZE); + if (p) { - memcpy(em + size - SHA512_DIGEST_SIZE, digest, SHA512_DIGEST_SIZE); - nettle_mpz_set_str_256_u(m, size, em); + memcpy(p, digest, SHA512_DIGEST_SIZE); + nettle_mpz_set_str_256_u(m, key_size, em); return 1; } else |