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New function to get all digests of a public key

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This commit is contained in:
Nick Mathewson 2011-09-13 14:32:51 -04:00
parent bc2d9357f5
commit dcf69a9e12
2 changed files with 27 additions and 0 deletions
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26
src/common/crypto.c
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@ -1249,6 +1249,32 @@ crypto_pk_get_digest(crypto_pk_env_t *pk, char *digest_out)
return 0; return 0;
} }
/** Compute all digests of the DER encoding of <b>pk</b>, and store them
* in <b>digests_out</b>. Return 0 on success, -1 on failure. */
int
crypto_pk_get_all_digests(crypto_pk_env_t *pk, digests_t *digests_out)
{
unsigned char *buf, *bufp;
int len;
len = i2d_RSAPublicKey(pk->key, NULL);
if (len < 0)
return -1;
buf = bufp = tor_malloc(len+1);
len = i2d_RSAPublicKey(pk->key, &bufp);
if (len < 0) {
crypto_log_errors(LOG_WARN,"encoding public key");
tor_free(buf);
return -1;
}
if (crypto_digest_all(digests_out, (char*)buf, len) < 0) {
tor_free(buf);
return -1;
}
tor_free(buf);
return 0;
}
/** Copy <b>in</b> to the <b>outlen</b>-byte buffer <b>out</b>, adding spaces /** Copy <b>in</b> to the <b>outlen</b>-byte buffer <b>out</b>, adding spaces
* every four spaces. */ * every four spaces. */
/* static */ void /* static */ void

1
src/common/crypto.h
View File

@ -150,6 +150,7 @@ int crypto_pk_private_hybrid_decrypt(crypto_pk_env_t *env, char *to,
int crypto_pk_asn1_encode(crypto_pk_env_t *pk, char *dest, size_t dest_len); int crypto_pk_asn1_encode(crypto_pk_env_t *pk, char *dest, size_t dest_len);
crypto_pk_env_t *crypto_pk_asn1_decode(const char *str, size_t len); crypto_pk_env_t *crypto_pk_asn1_decode(const char *str, size_t len);
int crypto_pk_get_digest(crypto_pk_env_t *pk, char *digest_out); int crypto_pk_get_digest(crypto_pk_env_t *pk, char *digest_out);
int crypto_pk_get_all_digests(crypto_pk_env_t *pk, digests_t *digests_out);
int crypto_pk_get_fingerprint(crypto_pk_env_t *pk, char *fp_out,int add_space); int crypto_pk_get_fingerprint(crypto_pk_env_t *pk, char *fp_out,int add_space);
int crypto_pk_check_fingerprint_syntax(const char *s); int crypto_pk_check_fingerprint_syntax(const char *s);