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82 lines
1.6 KiB
82 lines
1.6 KiB
#include "crypto.h"
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#include <string.h>
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#include "str.h"
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#include "aux.h"
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/* all lengths are in bits, some code assumes everything to be multiples of 8 */
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const struct crypto_suite crypto_suites[] = {
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{
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.name = "AES_CM_128_HMAC_SHA1_80",
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.master_key_len = 128,
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.master_salt_len = 112,
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.srtp_lifetime = 1ULL << 48,
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.srtcp_lifetime = 1ULL << 31,
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.cipher = CIPHER_AES_CM,
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.encryption_key = 128,
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.mac = MAC_HMAC_SHA1,
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.srtp_auth_tag = 80,
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.srtcp_auth_tag = 80,
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.srtp_auth_key_len = 160,
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.srtcp_auth_key_len = 160,
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},
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{
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.name = "AES_CM_128_HMAC_SHA1_32",
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.master_key_len = 128,
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.master_salt_len = 112,
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.srtp_lifetime = 1ULL << 48,
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.srtcp_lifetime = 1ULL << 31,
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.cipher = CIPHER_AES_CM,
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.encryption_key = 128,
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.mac = MAC_HMAC_SHA1,
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.srtp_auth_tag = 32,
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.srtcp_auth_tag = 80,
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.srtp_auth_key_len = 160,
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.srtcp_auth_key_len = 160,
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},
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{
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.name = "F8_128_HMAC_SHA1_80",
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.master_key_len = 128,
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.master_salt_len = 112,
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.srtp_lifetime = 1ULL << 48,
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.srtcp_lifetime = 1ULL << 31,
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.cipher = CIPHER_AES_F8,
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.encryption_key = 128,
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.mac = MAC_HMAC_SHA1,
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.srtp_auth_tag = 80,
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.srtcp_auth_tag = 80,
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.srtp_auth_key_len = 160,
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.srtcp_auth_key_len = 160,
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},
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};
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const int num_crypto_suites = ARRAYSIZE(crypto_suites);
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const struct crypto_suite *crypto_find_suite(const str *s) {
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int i, l;
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const struct crypto_suite *cs;
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for (i = 0; i < num_crypto_suites; i++) {
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cs = &crypto_suites[i];
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if (!cs->name)
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continue;
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l = strlen(cs->name);
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if (l != s->len)
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continue;
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if (strncasecmp(cs->name, s->s, s->len))
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continue;
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return cs;
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}
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return NULL;
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}
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