version 1.18, 2001/03/11 13:25:36 |
version 1.19, 2001/03/11 15:03:15 |
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return 0; |
return 0; |
} |
} |
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/* |
u_char* |
* Generate key fingerprint in ascii format. |
key_fingerprint_raw(Key *k, enum fp_type dgst_type, size_t *dgst_raw_length) |
* Based on ideas and code from Bjoern Groenvall <bg@sics.se> |
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*/ |
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char * |
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key_fingerprint(Key *k) |
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{ |
{ |
static char retval[(EVP_MAX_MD_SIZE+1)*3]; |
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u_char *blob = NULL; |
u_char *blob = NULL; |
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u_char *retval = NULL; |
int len = 0; |
int len = 0; |
int nlen, elen; |
int nlen, elen; |
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retval[0] = '\0'; |
*dgst_raw_length = 0; |
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switch (k->type) { |
switch (k->type) { |
case KEY_RSA1: |
case KEY_RSA1: |
nlen = BN_num_bytes(k->rsa->n); |
nlen = BN_num_bytes(k->rsa->n); |
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return retval; |
return retval; |
break; |
break; |
default: |
default: |
fatal("key_fingerprint: bad key type %d", k->type); |
fatal("key_fingerprint_raw: bad key type %d", k->type); |
break; |
break; |
} |
} |
if (blob != NULL) { |
if (blob != NULL) { |
int i; |
EVP_MD *md = NULL; |
u_char digest[EVP_MAX_MD_SIZE]; |
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EVP_MD *md = EVP_md5(); |
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EVP_MD_CTX ctx; |
EVP_MD_CTX ctx; |
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retval = xmalloc(EVP_MAX_MD_SIZE); |
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switch (dgst_type) { |
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case SSH_FP_MD5: |
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md = EVP_md5(); |
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break; |
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case SSH_FP_SHA1: |
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md = EVP_sha1(); |
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break; |
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default: |
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fatal("key_fingerprint_raw: bad digest type %d", |
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dgst_type); |
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} |
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EVP_DigestInit(&ctx, md); |
EVP_DigestInit(&ctx, md); |
EVP_DigestUpdate(&ctx, blob, len); |
EVP_DigestUpdate(&ctx, blob, len); |
EVP_DigestFinal(&ctx, digest, NULL); |
EVP_DigestFinal(&ctx, retval, NULL); |
for(i = 0; i < md->md_size; i++) { |
*dgst_raw_length = md->md_size; |
char hex[4]; |
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snprintf(hex, sizeof(hex), "%02x:", digest[i]); |
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strlcat(retval, hex, sizeof(retval)); |
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} |
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retval[strlen(retval) - 1] = '\0'; |
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memset(blob, 0, len); |
memset(blob, 0, len); |
xfree(blob); |
xfree(blob); |
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} else { |
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fatal("key_fingerprint_raw: blob is null"); |
} |
} |
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return retval; |
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} |
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char* |
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key_fingerprint_hex(u_char* dgst_raw, size_t dgst_raw_len) |
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{ |
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char *retval; |
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int i; |
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retval = xmalloc(dgst_raw_len * 3); |
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retval[0] = '\0'; |
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for(i = 0; i < dgst_raw_len; i++) { |
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char hex[4]; |
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snprintf(hex, sizeof(hex), "%02x:", dgst_raw[i]); |
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strlcat(retval, hex, dgst_raw_len * 3); |
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} |
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retval[(dgst_raw_len * 3) - 1] = '\0'; |
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return retval; |
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} |
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char* |
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key_fingerprint_bubblebabble(u_char* dgst_raw, size_t dgst_raw_len) |
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{ |
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char vowels[] = { 'a', 'e', 'i', 'o', 'u', 'y' }; |
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char consonants[] = { 'b', 'c', 'd', 'f', 'g', 'h', 'k', 'l', 'm', |
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'n', 'p', 'r', 's', 't', 'v', 'z', 'x' }; |
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u_int rounds, idx, retval_idx, seed; |
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char *retval; |
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rounds = (dgst_raw_len / 2) + 1; |
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retval = xmalloc(sizeof(char) * (rounds*6)); |
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seed = 1; |
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retval_idx = 0; |
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retval[retval_idx++] = 'x'; |
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for (idx=0;idx<rounds;idx++) { |
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u_int idx0, idx1, idx2, idx3, idx4; |
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if ((idx + 1 < rounds) || (dgst_raw_len % 2 != 0)) { |
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idx0 = (((((u_int)(dgst_raw[2 * idx])) >> 6) & 3) + |
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seed) % 6; |
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idx1 = (((u_int)(dgst_raw[2 * idx])) >> 2) & 15; |
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idx2 = ((((u_int)(dgst_raw[2 * idx])) & 3) + |
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(seed / 6)) % 6; |
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retval[retval_idx++] = vowels[idx0]; |
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retval[retval_idx++] = consonants[idx1]; |
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retval[retval_idx++] = vowels[idx2]; |
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if ((idx + 1) < rounds) { |
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idx3 = (((u_int)(dgst_raw[(2 * idx) + 1])) >> 4) & 15; |
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idx4 = (((u_int)(dgst_raw[(2 * idx) + 1]))) & 15; |
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retval[retval_idx++] = consonants[idx3]; |
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retval[retval_idx++] = '-'; |
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retval[retval_idx++] = consonants[idx4]; |
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seed = ((seed * 5) + |
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((((u_int)(dgst_raw[2 * idx])) * 7) + |
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((u_int)(dgst_raw[(2 * idx) + 1])))) % 36; |
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} |
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} else { |
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idx0 = seed % 6; |
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idx1 = 16; |
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idx2 = seed / 6; |
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retval[retval_idx++] = vowels[idx0]; |
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retval[retval_idx++] = consonants[idx1]; |
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retval[retval_idx++] = vowels[idx2]; |
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} |
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} |
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retval[retval_idx++] = 'x'; |
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retval[retval_idx++] = '\0'; |
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return retval; |
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} |
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char* |
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key_fingerprint_ex(Key *k, enum fp_type dgst_type, enum fp_rep dgst_rep) |
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{ |
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char *retval = NULL; |
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u_char *dgst_raw; |
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size_t dgst_raw_len; |
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dgst_raw = key_fingerprint_raw(k, dgst_type, &dgst_raw_len); |
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if (!dgst_raw) |
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fatal("key_fingerprint_ex: null value returned from key_fingerprint_raw()"); |
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switch(dgst_rep) { |
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case SSH_FP_HEX: |
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retval = key_fingerprint_hex(dgst_raw, dgst_raw_len); |
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break; |
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case SSH_FP_BUBBLEBABBLE: |
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retval = key_fingerprint_bubblebabble(dgst_raw, dgst_raw_len); |
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break; |
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default: |
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fatal("key_fingerprint_ex: bad digest representation %d", |
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dgst_rep); |
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break; |
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} |
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memset(dgst_raw, 0, dgst_raw_len); |
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xfree(dgst_raw); |
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return retval; |
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} |
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char * |
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key_fingerprint(Key *k) |
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{ |
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static char retval[(EVP_MAX_MD_SIZE + 1) * 3]; |
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char *digest; |
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digest = key_fingerprint_ex(k, SSH_FP_MD5, SSH_FP_HEX); |
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strlcpy(retval, digest, sizeof(retval)); |
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xfree(digest); |
return retval; |
return retval; |
} |
} |
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