[Asterisk-code-review] res_crypto: Use EVP API's instead of legacy API's (asterisk[19])
Friendly Automation
asteriskteam at digium.com
Mon Sep 12 17:11:24 CDT 2022
Friendly Automation has submitted this change. ( https://gerrit.asterisk.org/c/asterisk/+/19142 )
Change subject: res_crypto: Use EVP API's instead of legacy API's
......................................................................
res_crypto: Use EVP API's instead of legacy API's
ASTERISK-30046 #close
Change-Id: I5c738756de75fd27ebad54be144c0ac6193f21b2
---
M channels/chan_iax2.c
M include/asterisk/crypto.h
M res/res_crypto.c
M tests/test_crypto.c
4 files changed, 363 insertions(+), 78 deletions(-)
Approvals:
George Joseph: Looks good to me, approved
Friendly Automation: Approved for Submit
diff --git a/channels/chan_iax2.c b/channels/chan_iax2.c
index 0d42250..ab6bd61 100644
--- a/channels/chan_iax2.c
+++ b/channels/chan_iax2.c
@@ -6394,7 +6394,7 @@
#ifdef HAVE_OPENSSL
int i;
for (i = 0; i < 60; i++) {
- if (ecx->rd_key[i]) {
+ if (ecx->raw[i]) {
return 0; /* stop if we encounter anything non-zero */
}
}
diff --git a/include/asterisk/crypto.h b/include/asterisk/crypto.h
index da6add9..2a7ecf0 100644
--- a/include/asterisk/crypto.h
+++ b/include/asterisk/crypto.h
@@ -30,26 +30,22 @@
#include "asterisk/optional_api.h"
#include "asterisk/logger.h"
-#ifdef HAVE_CRYPTO
-#include "openssl/aes.h"
-typedef AES_KEY ast_aes_encrypt_key;
-typedef AES_KEY ast_aes_decrypt_key;
-#else /* !HAVE_CRYPTO */
-typedef char ast_aes_encrypt_key;
-typedef char ast_aes_decrypt_key;
-#endif /* HAVE_CRYPTO */
-
/* We previously used the key length explicitly; replace with constant.
* For now, Asterisk is limited to 1024 bit (128 byte) RSA keys.
*/
#define AST_CRYPTO_RSA_KEY_BITS 1024
#define AST_CRYPTO_AES_BLOCKSIZE 128
+struct aes_key {
+ unsigned char raw[AST_CRYPTO_AES_BLOCKSIZE / 8];
+};
+
+typedef struct aes_key ast_aes_encrypt_key;
+typedef struct aes_key ast_aes_decrypt_key;
+
#define AST_KEY_PUBLIC (1 << 0)
#define AST_KEY_PRIVATE (1 << 1)
-struct ast_key;
-
/*!
* \brief Retrieve a key
* \param kname Name of the key we are retrieving
@@ -169,20 +165,24 @@
* \param in data to be encrypted
* \param out pointer to a buffer to hold the encrypted output
* \param ctx address of an aes encryption context filled in with ast_aes_set_encrypt_key
+ * \retval <= 0 failure
+ * \retval otherwise number of bytes in output buffer
*/
-AST_OPTIONAL_API(void, ast_aes_encrypt,
- (const unsigned char *in, unsigned char *out, const ast_aes_encrypt_key *ctx),
- { ast_log(LOG_WARNING, "AES encryption disabled. Install OpenSSL.\n");return; });
+AST_OPTIONAL_API(int, ast_aes_encrypt,
+ (const unsigned char *in, unsigned char *out, const ast_aes_encrypt_key *key),
+ { ast_log(LOG_WARNING, "AES encryption disabled. Install OpenSSL.\n");return -1; });
/*!
* \brief AES decrypt data
* \param in encrypted data
* \param out pointer to a buffer to hold the decrypted output
* \param ctx address of an aes encryption context filled in with ast_aes_set_decrypt_key
+ * \retval <= 0 failure
+ * \retval otherwise number of bytes in output buffer
*/
-AST_OPTIONAL_API(void, ast_aes_decrypt,
- (const unsigned char *in, unsigned char *out, const ast_aes_decrypt_key *ctx),
- { ast_log(LOG_WARNING, "AES encryption disabled. Install OpenSSL.\n");return; });
+AST_OPTIONAL_API(int, ast_aes_decrypt,
+ (const unsigned char *in, unsigned char *out, const ast_aes_decrypt_key *key),
+ { ast_log(LOG_WARNING, "AES encryption disabled. Install OpenSSL.\n");return -1; });
AST_OPTIONAL_API(int, ast_crypto_loaded, (void), { return 0; });
diff --git a/res/res_crypto.c b/res/res_crypto.c
index 2a6a0e9..efcee7c 100644
--- a/res/res_crypto.c
+++ b/res/res_crypto.c
@@ -35,14 +35,11 @@
#include <dirent.h> /* for closedir, opendir, readdir, DIR */
-#define OPENSSL_SUPPRESS_DEPRECATED 1
-
-#include <openssl/aes.h> /* for AES_decrypt, AES_encrypt, AES_set... */
#include <openssl/err.h> /* for ERR_print_errors_fp */
#include <openssl/ssl.h> /* for NID_sha1, RSA */
-#include <openssl/pem.h> /* for PEM_read_RSAPrivateKey, PEM_read_... */
-#include <openssl/rsa.h> /* for RSA_free, RSA_private_decrypt, RSA */
-#include <openssl/sha.h> /* for SHA1 */
+#include <openssl/evp.h> /* for EVP_PKEY, EVP_sha1(), ... */
+#include <openssl/md5.h> /* for MD5_DIGEST_LENGTH */
+#include <openssl/sha.h> /* for SHA_DIGEST_LENGTH */
#include "asterisk/cli.h" /* for ast_cli, ast_cli_args, ast_cli_entry */
#include "asterisk/compat.h" /* for strcasecmp */
@@ -73,6 +70,11 @@
#define KEY_NEEDS_PASSCODE (1 << 16)
+/* From RFC-2437, section 9.1.1 the padding size is 1+2*hLen, where
+ * the hLen for SHA-1 is 20 bytes (or 160 bits).
+ */
+#define RSA_PKCS1_OAEP_PADDING_SIZE (1 + 2 * SHA_DIGEST_LENGTH)
+
struct ast_key {
/*! Name of entity */
char name[80];
@@ -80,8 +82,8 @@
char fn[256];
/*! Key type (AST_KEY_PUB or AST_KEY_PRIV, along with flags from above) */
int ktype;
- /*! RSA structure (if successfully loaded) */
- RSA *rsa;
+ /*! RSA key structure (if successfully loaded) */
+ EVP_PKEY *pkey;
/*! Whether we should be deleted */
int delme;
/*! FD for input (or -1 if no input allowed, or -2 if we needed input) */
@@ -89,7 +91,7 @@
/*! FD for output */
int outfd;
/*! Last MD5 Digest */
- unsigned char digest[16];
+ unsigned char digest[MD5_DIGEST_LENGTH];
AST_RWLIST_ENTRY(ast_key) list;
};
@@ -172,9 +174,10 @@
{
int ktype = 0, found = 0;
char *c = NULL, ffname[256];
- unsigned char digest[16];
+ unsigned char digest[MD5_DIGEST_LENGTH];
+ unsigned digestlen;
FILE *f;
- struct MD5Context md5;
+ EVP_MD_CTX *ctx = NULL;
struct ast_key *key;
static int notice = 0;
@@ -196,7 +199,14 @@
return NULL;
}
- MD5Init(&md5);
+ ctx = EVP_MD_CTX_create();
+ if (ctx == NULL) {
+ ast_log(LOG_ERROR, "Out of memory\n");
+ fclose(f);
+ return NULL;
+ }
+ EVP_DigestInit(ctx, EVP_md5());
+
while (!feof(f)) {
/* Calculate a "whatever" quality md5sum of the key */
char buf[256] = "";
@@ -204,10 +214,11 @@
continue;
}
if (!feof(f)) {
- MD5Update(&md5, (unsigned char *) buf, strlen(buf));
+ EVP_DigestUpdate(ctx, (unsigned char *)buf, strlen(buf));
}
}
- MD5Final(digest, &md5);
+ EVP_DigestFinal(ctx, digest, &digestlen);
+ EVP_MD_CTX_destroy(ctx);
/* Look for an existing key */
AST_RWLIST_TRAVERSE(&keys, key, list) {
@@ -219,7 +230,7 @@
if (key) {
/* If the MD5 sum is the same, and it isn't awaiting a passcode
then this is far enough */
- if (!memcmp(digest, key->digest, 16) &&
+ if (!memcmp(digest, key->digest, sizeof(digest)) &&
!(key->ktype & KEY_NEEDS_PASSCODE)) {
fclose(f);
key->delme = 0;
@@ -248,7 +259,7 @@
/* Yes, assume we're going to be deleted */
key->delme = 1;
/* Keep the key type */
- memcpy(key->digest, digest, 16);
+ memcpy(key->digest, digest, sizeof(key->digest));
/* Can I/O takes the FD we're given */
key->infd = ifd;
key->outfd = ofd;
@@ -256,13 +267,13 @@
rewind(f);
/* Now load the key with the right method */
if (ktype == AST_KEY_PUBLIC) {
- key->rsa = PEM_read_RSA_PUBKEY(f, NULL, pw_cb, key);
+ PEM_read_PUBKEY(f, &key->pkey, pw_cb, key);
} else {
- key->rsa = PEM_read_RSAPrivateKey(f, NULL, pw_cb, key);
+ PEM_read_PrivateKey(f, &key->pkey, pw_cb, key);
}
fclose(f);
- if (key->rsa) {
- if (RSA_size(key->rsa) == 128) {
+ if (key->pkey) {
+ if (EVP_PKEY_size(key->pkey) == (AST_CRYPTO_RSA_KEY_BITS / 8)) {
/* Key loaded okay */
key->ktype &= ~KEY_NEEDS_PASSCODE;
ast_verb(3, "Loaded %s key '%s'\n", key->ktype == AST_KEY_PUBLIC ? "PUBLIC" : "PRIVATE", key->name);
@@ -301,97 +312,231 @@
return key;
}
+static int evp_pkey_sign(EVP_PKEY *pkey, const unsigned char *in, unsigned inlen, unsigned char *sig, unsigned *siglen, unsigned padding)
+{
+ EVP_PKEY_CTX *ctx = NULL;
+ int res = -1;
+ size_t _siglen;
+
+ if (*siglen < EVP_PKEY_size(pkey)) {
+ return -1;
+ }
+
+ if ((ctx = EVP_PKEY_CTX_new(pkey, NULL)) == NULL) {
+ return -1;
+ }
+
+ do {
+ if ((res = EVP_PKEY_sign_init(ctx)) <= 0) {
+ break;
+ }
+ if ((res = EVP_PKEY_CTX_set_rsa_padding(ctx, padding)) <= 0) {
+ break;
+ }
+ if ((res = EVP_PKEY_CTX_set_signature_md(ctx, EVP_sha1())) <= 0) {
+ break;
+ }
+ _siglen = *siglen;
+ if ((res = EVP_PKEY_sign(ctx, sig, &_siglen, in, inlen)) <= 0) {
+ break;
+ }
+ *siglen = _siglen;
+ } while (0);
+
+ EVP_PKEY_CTX_free(ctx);
+ return res;
+}
+
/*!
* \brief signs outgoing message with public key
* \see ast_sign_bin
*/
int AST_OPTIONAL_API_NAME(ast_sign_bin)(struct ast_key *key, const char *msg, int msglen, unsigned char *dsig)
{
- unsigned char digest[20];
- unsigned int siglen = 128;
+ unsigned char digest[SHA_DIGEST_LENGTH];
+ unsigned digestlen, siglen = 128;
int res;
+ EVP_MD_CTX *ctx = NULL;
if (key->ktype != AST_KEY_PRIVATE) {
ast_log(LOG_WARNING, "Cannot sign with a public key\n");
return -1;
}
- /* Calculate digest of message */
- SHA1((unsigned char *)msg, msglen, digest);
-
- /* Verify signature */
- if ((res = RSA_sign(NID_sha1, digest, sizeof(digest), dsig, &siglen, key->rsa)) != 1) {
- ast_log(LOG_WARNING, "RSA Signature (key %s) failed\n", key->name);
+ if (siglen < EVP_PKEY_size(key->pkey)) {
+ ast_log(LOG_WARNING, "Signature buffer too small\n");
return -1;
}
- if (siglen != 128) {
- ast_log(LOG_WARNING, "Unexpected signature length %d, expecting %d\n", (int)siglen, (int)128);
+ /* Calculate digest of message */
+ ctx = EVP_MD_CTX_create();
+ if (ctx == NULL) {
+ ast_log(LOG_ERROR, "Out of memory\n");
+ return -1;
+ }
+ EVP_DigestInit(ctx, EVP_sha1());
+ EVP_DigestUpdate(ctx, msg, msglen);
+ EVP_DigestFinal(ctx, digest, &digestlen);
+ EVP_MD_CTX_destroy(ctx);
+
+ /* Verify signature */
+ if ((res = evp_pkey_sign(key->pkey, digest, sizeof(digest), dsig, &siglen, RSA_PKCS1_PADDING)) <= 0) {
+ ast_log(LOG_WARNING, "RSA Signature (key %s) failed %d\n", key->name, res);
+ return -1;
+ }
+
+ if (siglen != EVP_PKEY_size(key->pkey)) {
+ ast_log(LOG_WARNING, "Unexpected signature length %u, expecting %d\n", siglen, EVP_PKEY_size(key->pkey));
return -1;
}
return 0;
}
+static int evp_pkey_decrypt(EVP_PKEY *pkey, const unsigned char *in, unsigned inlen, unsigned char *out, unsigned *outlen, unsigned padding)
+{
+ EVP_PKEY_CTX *ctx = NULL;
+ int res = -1;
+ size_t _outlen;
+
+ if (*outlen < EVP_PKEY_size(pkey)) {
+ return -1;
+ }
+
+ if (inlen != EVP_PKEY_size(pkey)) {
+ return -1;
+ }
+
+ if ((ctx = EVP_PKEY_CTX_new(pkey, NULL)) == NULL) {
+ return -1;
+ }
+
+ do {
+ if ((res = EVP_PKEY_decrypt_init(ctx)) <= 0) {
+ break;
+ }
+ if ((res = EVP_PKEY_CTX_set_rsa_padding(ctx, padding)) <= 0) {
+ break;
+ }
+ _outlen = *outlen;
+ if ((res = EVP_PKEY_decrypt(ctx, out, &_outlen, in, inlen)) <= 0) {
+ break;
+ }
+ res = *outlen = _outlen;
+ } while (0);
+
+ EVP_PKEY_CTX_free(ctx);
+ return res;
+}
+
/*!
* \brief decrypt a message
* \see ast_decrypt_bin
*/
int AST_OPTIONAL_API_NAME(ast_decrypt_bin)(unsigned char *dst, const unsigned char *src, int srclen, struct ast_key *key)
{
- int res, pos = 0;
+ int res;
+ unsigned pos = 0, dstlen, blocksize;
if (key->ktype != AST_KEY_PRIVATE) {
ast_log(LOG_WARNING, "Cannot decrypt with a public key\n");
return -1;
}
- if (srclen % 128) {
- ast_log(LOG_NOTICE, "Tried to decrypt something not a multiple of 128 bytes\n");
+ blocksize = EVP_PKEY_size(key->pkey);
+
+ if (srclen % blocksize) {
+ ast_log(LOG_NOTICE, "Tried to decrypt something not a multiple of %u bytes\n", blocksize);
return -1;
}
- while (srclen) {
+ while (srclen > 0) {
/* Process chunks 128 bytes at a time */
- if ((res = RSA_private_decrypt(128, src, dst, key->rsa, RSA_PKCS1_OAEP_PADDING)) < 0) {
+ dstlen = blocksize;
+ if ((res = evp_pkey_decrypt(key->pkey, src, blocksize, dst, &dstlen, RSA_PKCS1_OAEP_PADDING)) <= 0) {
return -1;
}
- pos += res;
- src += 128;
- srclen -= 128;
- dst += res;
+ pos += dstlen;
+ src += blocksize;
+ srclen -= blocksize;
+ dst += dstlen;
}
return pos;
}
+static int evp_pkey_encrypt(EVP_PKEY *pkey, const unsigned char *in, unsigned inlen, unsigned char *out, unsigned *outlen, unsigned padding)
+{
+ EVP_PKEY_CTX *ctx = NULL;
+ int res = -1;
+ size_t _outlen;
+
+ if (padding != RSA_PKCS1_OAEP_PADDING) {
+ ast_log(LOG_WARNING, "Only OAEP padding is supported for now\n");
+ return -1;
+ }
+
+ if (inlen > EVP_PKEY_size(pkey) - RSA_PKCS1_OAEP_PADDING_SIZE) {
+ return -1;
+ }
+
+ if (*outlen < EVP_PKEY_size(pkey)) {
+ return -1;
+ }
+
+ do {
+ if ((ctx = EVP_PKEY_CTX_new(pkey, NULL)) == NULL) {
+ break;
+ }
+
+ if ((res = EVP_PKEY_encrypt_init(ctx)) <= 0) {
+ break;
+ }
+ if ((res = EVP_PKEY_CTX_set_rsa_padding(ctx, padding)) <= 0) {
+ break;
+ }
+ _outlen = *outlen;
+ if ((res = EVP_PKEY_encrypt(ctx, out, &_outlen, in, inlen)) <= 0) {
+ break;
+ }
+ res = *outlen = _outlen;
+ } while (0);
+
+ EVP_PKEY_CTX_free(ctx);
+ return res;
+}
+
/*!
* \brief encrypt a message
* \see ast_encrypt_bin
*/
int AST_OPTIONAL_API_NAME(ast_encrypt_bin)(unsigned char *dst, const unsigned char *src, int srclen, struct ast_key *key)
{
- int res, bytes, pos = 0;
+ unsigned bytes, pos = 0, dstlen, blocksize;
+ int res;
if (key->ktype != AST_KEY_PUBLIC) {
ast_log(LOG_WARNING, "Cannot encrypt with a private key\n");
return -1;
}
+ blocksize = EVP_PKEY_size(key->pkey);
+
while (srclen) {
bytes = srclen;
- if (bytes > 128 - 41) {
- bytes = 128 - 41;
+ if (bytes > blocksize - RSA_PKCS1_OAEP_PADDING_SIZE) {
+ bytes = blocksize - RSA_PKCS1_OAEP_PADDING_SIZE;
}
/* Process chunks 128-41 bytes at a time */
- if ((res = RSA_public_encrypt(bytes, src, dst, key->rsa, RSA_PKCS1_OAEP_PADDING)) != 128) {
+ dstlen = blocksize;
+ if ((res = evp_pkey_encrypt(key->pkey, src, bytes, dst, &dstlen, RSA_PKCS1_OAEP_PADDING)) != blocksize) {
ast_log(LOG_NOTICE, "How odd, encrypted size is %d\n", res);
return -1;
}
src += bytes;
srclen -= bytes;
- pos += res;
- dst += res;
+ pos += dstlen;
+ dst += dstlen;
}
return pos;
}
@@ -402,6 +547,7 @@
*/
int AST_OPTIONAL_API_NAME(ast_sign)(struct ast_key *key, char *msg, char *sig)
{
+ /* assumes 1024 bit RSA key size */
unsigned char dsig[128];
int siglen = sizeof(dsig), res;
@@ -413,14 +559,48 @@
return res;
}
+static int evp_pkey_verify(EVP_PKEY *pkey, const unsigned char *in, unsigned inlen, const unsigned char *sig, unsigned siglen, unsigned padding)
+{
+ EVP_PKEY_CTX *ctx = NULL;
+ int res = -1;
+
+ if (siglen < EVP_PKEY_size(pkey)) {
+ return -1;
+ }
+
+ if ((ctx = EVP_PKEY_CTX_new(pkey, NULL)) == NULL) {
+ return -1;
+ }
+
+ do {
+ if ((res = EVP_PKEY_verify_init(ctx)) <= 0) {
+ break;
+ }
+ if ((res = EVP_PKEY_CTX_set_rsa_padding(ctx, padding)) <= 0) {
+ break;
+ }
+ if ((res = EVP_PKEY_CTX_set_signature_md(ctx, EVP_sha1())) <= 0) {
+ break;
+ }
+ if ((res = EVP_PKEY_verify(ctx, sig, siglen, in, inlen)) <= 0) {
+ break;
+ }
+ } while (0);
+
+ EVP_PKEY_CTX_free(ctx);
+ return res;
+}
+
/*!
* \brief check signature of a message
* \see ast_check_signature_bin
*/
int AST_OPTIONAL_API_NAME(ast_check_signature_bin)(struct ast_key *key, const char *msg, int msglen, const unsigned char *dsig)
{
- unsigned char digest[20];
+ unsigned char digest[SHA_DIGEST_LENGTH];
+ unsigned digestlen;
int res;
+ EVP_MD_CTX *ctx = NULL;
if (key->ktype != AST_KEY_PUBLIC) {
/* Okay, so of course you really *can* but for our purposes
@@ -430,10 +610,18 @@
}
/* Calculate digest of message */
- SHA1((unsigned char *)msg, msglen, digest);
+ ctx = EVP_MD_CTX_create();
+ if (ctx == NULL) {
+ ast_log(LOG_ERROR, "Out of memory\n");
+ return -1;
+ }
+ EVP_DigestInit(ctx, EVP_sha1());
+ EVP_DigestUpdate(ctx, msg, msglen);
+ EVP_DigestFinal(ctx, digest, &digestlen);
+ EVP_MD_CTX_destroy(ctx);
/* Verify signature */
- if ((res = RSA_verify(NID_sha1, digest, sizeof(digest), (unsigned char *)dsig, 128, key->rsa)) != 1) {
+ if (!(res = evp_pkey_verify(key->pkey, (const unsigned char *)digest, sizeof(digest), (unsigned char *)dsig, 128, RSA_PKCS1_PADDING))) {
ast_debug(1, "Key failed verification: %s\n", key->name);
return -1;
}
@@ -475,22 +663,102 @@
int AST_OPTIONAL_API_NAME(ast_aes_set_encrypt_key)(const unsigned char *key, ast_aes_encrypt_key *ctx)
{
- return AES_set_encrypt_key(key, 128, ctx);
+ if (key == NULL || ctx == NULL) {
+ return -1;
+ }
+ memcpy(ctx->raw, key, AST_CRYPTO_AES_BLOCKSIZE / 8);
+ return 0;
}
int AST_OPTIONAL_API_NAME(ast_aes_set_decrypt_key)(const unsigned char *key, ast_aes_decrypt_key *ctx)
{
- return AES_set_decrypt_key(key, 128, ctx);
+ if (key == NULL || ctx == NULL) {
+ return -1;
+ }
+ memcpy(ctx->raw, key, AST_CRYPTO_AES_BLOCKSIZE / 8);
+ return 0;
}
-void AST_OPTIONAL_API_NAME(ast_aes_encrypt)(const unsigned char *in, unsigned char *out, const ast_aes_encrypt_key *ctx)
+static int evp_cipher_aes_encrypt(const unsigned char *in, unsigned char *out, unsigned inlen, const ast_aes_encrypt_key *key)
{
- return AES_encrypt(in, out, ctx);
+ EVP_CIPHER_CTX *ctx = NULL;
+ int res, outlen, finallen;
+ unsigned char final[AST_CRYPTO_AES_BLOCKSIZE / 8];
+
+ if ((ctx = EVP_CIPHER_CTX_new()) == NULL) {
+ return -1;
+ }
+
+ do {
+ if ((res = EVP_CipherInit(ctx, EVP_aes_128_ecb(), key->raw, NULL, 1)) <= 0) {
+ break;
+ }
+ EVP_CIPHER_CTX_set_padding(ctx, 0);
+ if ((res = EVP_CipherUpdate(ctx, out, &outlen, in, inlen)) <= 0) {
+ break;
+ }
+ /* for ECB, this is a no-op */
+ if ((res = EVP_CipherFinal(ctx, final, &finallen)) <= 0) {
+ break;
+ }
+
+ res = outlen;
+ } while (0);
+
+ EVP_CIPHER_CTX_free(ctx);
+
+ return res;
}
-void AST_OPTIONAL_API_NAME(ast_aes_decrypt)(const unsigned char *in, unsigned char *out, const ast_aes_decrypt_key *ctx)
+int AST_OPTIONAL_API_NAME(ast_aes_encrypt)(const unsigned char *in, unsigned char *out, const ast_aes_encrypt_key *key)
{
- return AES_decrypt(in, out, ctx);
+ int res;
+
+ if ((res = evp_cipher_aes_encrypt(in, out, AST_CRYPTO_AES_BLOCKSIZE / 8, key)) <= 0) {
+ ast_log(LOG_ERROR, "AES encryption failed\n");
+ }
+ return res;
+}
+
+static int evp_cipher_aes_decrypt(const unsigned char *in, unsigned char *out, unsigned inlen, const ast_aes_decrypt_key *key)
+{
+ EVP_CIPHER_CTX *ctx = NULL;
+ int res, outlen, finallen;
+ unsigned char final[AST_CRYPTO_AES_BLOCKSIZE / 8];
+
+ if ((ctx = EVP_CIPHER_CTX_new()) == NULL) {
+ return -1;
+ }
+
+ do {
+ if ((res = EVP_CipherInit(ctx, EVP_aes_128_ecb(), key->raw, NULL, 0)) <= 0) {
+ break;
+ }
+ EVP_CIPHER_CTX_set_padding(ctx, 0);
+ if ((res = EVP_CipherUpdate(ctx, out, &outlen, in, inlen)) <= 0) {
+ break;
+ }
+ /* for ECB, this is a no-op */
+ if ((res = EVP_CipherFinal(ctx, final, &finallen)) <= 0) {
+ break;
+ }
+
+ res = outlen;
+ } while (0);
+
+ EVP_CIPHER_CTX_free(ctx);
+
+ return res;
+}
+
+int AST_OPTIONAL_API_NAME(ast_aes_decrypt)(const unsigned char *in, unsigned char *out, const ast_aes_decrypt_key *key)
+{
+ int res;
+
+ if ((res = evp_cipher_aes_decrypt(in, out, AST_CRYPTO_AES_BLOCKSIZE / 8, key)) <= 0) {
+ ast_log(LOG_ERROR, "AES decryption failed\n");
+ }
+ return res;
}
/*!
@@ -538,8 +806,8 @@
if (key->delme) {
ast_debug(1, "Deleting key %s type %d\n", key->name, key->ktype);
AST_RWLIST_REMOVE_CURRENT(list);
- if (key->rsa) {
- RSA_free(key->rsa);
+ if (key->pkey) {
+ EVP_PKEY_free(key->pkey);
}
ast_free(key);
}
@@ -552,7 +820,7 @@
static void md52sum(char *sum, unsigned char *md5)
{
int x;
- for (x = 0; x < 16; x++) {
+ for (x = 0; x < MD5_DIGEST_LENGTH; x++) {
sum += sprintf(sum, "%02hhx", *(md5++));
}
}
@@ -569,7 +837,7 @@
#define FORMAT "%-18s %-8s %-16s %-33s\n"
struct ast_key *key;
- char sum[16 * 2 + 1];
+ char sum[MD5_DIGEST_LENGTH * 2 + 1];
int count_keys = 0;
switch (cmd) {
diff --git a/tests/test_crypto.c b/tests/test_crypto.c
index 55497d6..141781b 100644
--- a/tests/test_crypto.c
+++ b/tests/test_crypto.c
@@ -498,7 +498,10 @@
memset(buf, 0, sizeof(buf));
ast_aes_set_encrypt_key(key, &aes_key);
- ast_aes_encrypt(plaintext, buf, &aes_key);
+ if (ast_aes_encrypt(plaintext, buf, &aes_key) <= 0) {
+ ast_test_status_update(test, "ast_aes_encrypt() failed\n");
+ goto cleanup;
+ }
args[KEY] = hexstring(key, sizeof(key));
if (ast_test_capture_command(&cap, command, args, (const char *)buf, sizeof(buf)) != 1) {
@@ -594,7 +597,10 @@
memset(buf, 0, sizeof(buf));
ast_aes_set_decrypt_key(key, &aes_key);
- ast_aes_decrypt((const unsigned char *)cap.outbuf, buf, &aes_key);
+ if (ast_aes_decrypt((const unsigned char *)cap.outbuf, buf, &aes_key) <= 0) {
+ ast_test_status_update(test, "ast_aes_decrypt() failed\n");
+ goto cleanup;
+ }
if (memcmp(plaintext, buf, sizeof(plaintext))) {
ast_test_status_update(test, "AES decryption mismatch\n");
--
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Gerrit-Project: asterisk
Gerrit-Branch: 19
Gerrit-Change-Id: I5c738756de75fd27ebad54be144c0ac6193f21b2
Gerrit-Change-Number: 19142
Gerrit-PatchSet: 2
Gerrit-Owner: Philip Prindeville <philipp at redfish-solutions.com>
Gerrit-Reviewer: Friendly Automation
Gerrit-Reviewer: George Joseph <gjoseph at digium.com>
Gerrit-MessageType: merged
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