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Backported from xs.

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default 2022-09-26 14:44:53 +02:00
parent 1834dc57b0
commit e3cea55770
1 changed files with 41 additions and 0 deletions
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41
xs_openssl.h
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@ -11,6 +11,7 @@ d_char *xs_sha256_base64(const void *input, int size);
d_char *xs_rsa_genkey(int bits);
d_char *xs_rsa_sign(char *secret, char *mem, int size);
int xs_rsa_verify(char *pubkey, char *mem, int size, char *b64sig);
d_char *xs_evp_sign(char *secret, char *mem, int size);
#ifdef XS_IMPLEMENTATION
@ -19,6 +20,7 @@ int xs_rsa_verify(char *pubkey, char *mem, int size, char *b64sig);
#include "openssl/sha.h"
#include "openssl/rsa.h"
#include "openssl/pem.h"
#include "openssl/evp.h"
d_char *xs_md5_hex(const void *input, int size)
{
@ -174,6 +176,45 @@ int xs_rsa_verify(char *pubkey, char *mem, int size, char *b64sig)
return r;
}
d_char *xs_evp_sign(char *secret, char *mem, int size)
/* signs a memory block (secret is in PEM format) */
{
d_char *signature = NULL;
BIO *b;
unsigned char *sig;
unsigned int sig_len;
EVP_PKEY *pkey;
EVP_MD_CTX *mdctx;
const EVP_MD *md;
/* un-PEM the key */
b = BIO_new_mem_buf(secret, strlen(secret));
pkey = PEM_read_bio_PrivateKey(b, NULL, NULL, NULL);
md = EVP_get_digestbyname("sha256");
mdctx = EVP_MD_CTX_new();
sig_len = EVP_PKEY_size(pkey);
sig = malloc(sig_len);
EVP_SignInit(mdctx, md);
EVP_SignUpdate(mdctx, mem, size);
if (EVP_SignFinal(mdctx, sig, &sig_len, pkey) == 1)
signature = xs_base64_enc((char *)sig, sig_len);
EVP_MD_CTX_free(mdctx);
BIO_free(b);
free(sig);
return signature;
}
#endif /* XS_IMPLEMENTATION */
#endif /* _XS_OPENSSL_H */