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rsa_verify function

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NIIBE Yutaka
2012-05-29 12:14:10 +09:00
parent f8bb88227a
commit 6ba65c8d8b
3 changed files with 34 additions and 0 deletions
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2
ChangeLog
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@@ -1,5 +1,7 @@
2012-05-29 Niibe Yutaka <gniibe@fsij.org>
* src/call-rsa.c (rsa_verify): New function.
* polarssl-0.14.0/include/polarssl/rsa.h (rsa_pkcs1_verify)
* polarssl-0.14.0/library/rsa.c (rsa_pkcs1_verify): Fix API.

30
src/call-rsa.c
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@@ -183,3 +183,33 @@ rsa_decrypt (const uint8_t *input, uint8_t *output, int msg_len,
return 0;
}
}
int
rsa_verify (const uint8_t *pubkey, const uint8_t *hash, int hashlen,
const uint8_t *signature)
{
int r;
rsa_init (&rsa_ctx, RSA_PKCS_V15, 0);
rsa_ctx.len = KEY_CONTENT_LEN;
mpi_read_string (&rsa_ctx.E, 16, "10001");
mpi_read_binary (&rsa_ctx.N, pubkey, KEY_CONTENT_LEN);
DEBUG_INFO ("RSA verify...");
r = rsa_pkcs1_verify (&rsa_ctx, RSA_PUBLIC, SIG_RSA_RAW, hashlen,
hash, signature);
rsa_free (&rsa_ctx);
if (r < 0)
{
DEBUG_INFO ("fail:");
DEBUG_SHORT (r);
return r;
}
else
{
DEBUG_INFO ("verified.\r\n");
return 0;
}
}

2
src/gnuk.h
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@@ -225,6 +225,8 @@ extern int rsa_sign (const uint8_t *, uint8_t *, int, struct key_data *);
extern const uint8_t *modulus_calc (const uint8_t *, int);
extern void modulus_free (const uint8_t *);
extern int rsa_decrypt (const uint8_t *, uint8_t *, int, struct key_data *);
extern int rsa_verify (const uint8_t *pubkey, const uint8_t *hash, int hashlen,
const uint8_t *signature);
extern const uint8_t *gpg_do_read_simple (uint8_t);
extern void gpg_do_write_simple (uint8_t, const uint8_t *, int);