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basic/openssl-util: Add sha256 hash wrapper

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This commit is contained in:
Kevin Kuehler 2020-12-10 16:08:11 -08:00 committed by Zbigniew Jędrzejewski-Szmek
parent 1736344e9e
commit fc169a6fb2
2 changed files with 39 additions and 0 deletions
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37
src/shared/openssl-util.c
View File

@ -4,6 +4,43 @@
#include "alloc-util.h"
#if HAVE_OPENSSL
int openssl_hash(const EVP_MD *alg,
const void *msg,
size_t msg_len,
uint8_t *ret_hash,
size_t *ret_hash_len) {
_cleanup_(EVP_MD_CTX_freep) EVP_MD_CTX *ctx = NULL;
unsigned len;
int r;
ctx = EVP_MD_CTX_new();
if (!ctx)
/* This function just calls OPENSSL_zalloc, so failure
* here is almost certainly a failed allocation. */
return -ENOMEM;
/* The documentation claims EVP_DigestInit behaves just like
* EVP_DigestInit_ex if passed NULL, except it also calls
* EVP_MD_CTX_reset, which deinitializes the context. */
r = EVP_DigestInit_ex(ctx, alg, NULL);
if (r == 0)
return -EIO;
r = EVP_DigestUpdate(ctx, msg, msg_len);
if (r == 0)
return -EIO;
r = EVP_DigestFinal_ex(ctx, ret_hash, &len);
if (r == 0)
return -EIO;
if (ret_hash_len)
*ret_hash_len = len;
return 0;
}
int rsa_encrypt_bytes(
EVP_PKEY *pkey,
const void *decrypted_key,

2
src/shared/openssl-util.h
View File

@ -36,6 +36,8 @@ static inline void sk_X509_free_allp(STACK_OF(X509) **sk) {
sk_X509_pop_free(*sk, X509_free);
}
int openssl_hash(const EVP_MD *alg, const void *msg, size_t msg_len, uint8_t *ret_hash, size_t *ret_hash_len);
int rsa_encrypt_bytes(EVP_PKEY *pkey, const void *decrypted_key, size_t decrypted_key_size, void **ret_encrypt_key, size_t *ret_encrypt_key_size);
int rsa_pkey_to_suitable_key_size(EVP_PKEY *pkey, size_t *ret_suitable_key_size);