version 1.10.2.3, 2002/05/17 00:03:24 |
version 1.10.2.4, 2002/06/22 07:23:18 |
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EVP_MD_CTX md; |
EVP_MD_CTX md; |
char *ktype; |
char *ktype; |
u_char digest[EVP_MAX_MD_SIZE], *sigblob; |
u_char digest[EVP_MAX_MD_SIZE], *sigblob; |
u_int len, dlen; |
u_int len, dlen, modlen; |
int rlen, ret, nid; |
int rlen, ret, nid; |
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if (key == NULL || key->type != KEY_RSA || key->rsa == NULL) { |
if (key == NULL || key->type != KEY_RSA || key->rsa == NULL) { |
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return -1; |
return -1; |
} |
} |
if (BN_num_bits(key->rsa->n) < SSH_RSA_MINIMUM_MODULUS_SIZE) { |
if (BN_num_bits(key->rsa->n) < SSH_RSA_MINIMUM_MODULUS_SIZE) { |
error("ssh_rsa_verify: n too small: %d bits", |
error("ssh_rsa_verify: RSA modulus too small: %d < minimum %d bits", |
BN_num_bits(key->rsa->n)); |
BN_num_bits(key->rsa->n), SSH_RSA_MINIMUM_MODULUS_SIZE); |
return -1; |
return -1; |
} |
} |
buffer_init(&b); |
buffer_init(&b); |
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error("ssh_rsa_verify: remaining bytes in signature %d", rlen); |
error("ssh_rsa_verify: remaining bytes in signature %d", rlen); |
xfree(sigblob); |
xfree(sigblob); |
return -1; |
return -1; |
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} |
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/* RSA_verify expects a signature of RSA_size */ |
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modlen = RSA_size(key->rsa); |
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if (len > modlen) { |
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error("ssh_rsa_verify: len %d > modlen %d", len, modlen); |
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xfree(sigblob); |
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return -1; |
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} else if (len < modlen) { |
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int diff = modlen - len; |
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debug("ssh_rsa_verify: add padding: modlen %d > len %d", |
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modlen, len); |
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sigblob = xrealloc(sigblob, modlen); |
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memmove(sigblob + diff, sigblob, len); |
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memset(sigblob, 0, diff); |
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len = modlen; |
} |
} |
nid = (datafellows & SSH_BUG_RSASIGMD5) ? NID_md5 : NID_sha1; |
nid = (datafellows & SSH_BUG_RSASIGMD5) ? NID_md5 : NID_sha1; |
if ((evp_md = EVP_get_digestbynid(nid)) == NULL) { |
if ((evp_md = EVP_get_digestbynid(nid)) == NULL) { |