In the latest version of libressl, RSA_generate_key is deprecated, RSA_generate_key_ex should be implemented instead. Implementation (updated) Source file (test.c)
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#include <openssl/rsa.h> #include <openssl/pem.h> int main(){ const int kBits = 2048; unsigned long e = RSA_F4; int keylen; char *pem_key; // BIGNUM PART BIGNUM* bignum = BN_new(); if(BN_set_word(bignum, e)) printf("[Debug] BIGNUM allocated!\n"); else printf("[Debug] BIGNUM NOT allocated!\n"); // RSA PART RSA *rsa = RSA_new(); if(RSA_generate_key_ex(rsa, 2048, bignum, NULL)) printf("[Debug] RSA allocated!\n"); else printf("[Debug] RSA NOT allocated!\n"); // BIO PART BIO *bio = BIO_new(BIO_s_mem()); PEM_write_bio_RSAPrivateKey(bio, rsa, NULL, NULL, 0, NULL, NULL); keylen = BIO_pending(bio); pem_key = calloc(keylen+1, 1); /* Null-terminate */ BIO_read(bio, pem_key, keylen); // OUTPUT printf("%s", pem_key); // FREE THE MEMORY BIO_free_all(bio); RSA_free(rsa); BN_free(bignum); free(pem_key); return 0; } |
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